I think it's a much fairer question than is generally assumed. I think we ASSUME people want an easy a answer, that people don't want to work at all and that people don't want to hear that moving more and eating less is the essential part of the equation.
People are willing to do insanely difficult and even horrific things to lose weight, so I don't think laziness is really the answer. Yes, people do have times sticking it out through the long haul, but I think that's because we're taught to see failure instead of success. Persistance doesn't always pay off, and if we fail far more than we succeed, giving up is actually a very good thing. If someone wants to be a professional singer, but just doesn't have the talent for it, eventually failure will tell the person to "give up, this dream isn't for you."
We say "if at first you don't succeed, try try agian," but what we aren't saying is "if you try a thousand times and you don't succeed, maybe you should give up and try something else."
We're taught to fail, because we're taught to have extremely unrealistic expectations and not because we're lazy, crazy, or stupid - but because the "common wisdom" is wrong.
I know I failed most of my life at weight loss, despite putting far more effort into it than anything else in my life (including my college degrees and my marriage). Not because I was lazy and didn't want to work, heck most of my teen and adult life I juggled school and a job or two and after college two jobs). I failed because I thought I was failing, because I wasn't losing what "common wisdom" told me I should be losing (the traditional two pounds or more per week). When I would go three or four weeks without a weight loss or without a substanctial weight loss (again the magic two pounds), despite exercising and not eating off-plan I would think I was failing and get discouraged. I would often then "slip" from my good eating and see it as proof (heck others told me it was proof) that I wasn't able to succeed. I ignored the proof (the weight loss I had accomplished) that I could suceed and actually was succeeding.
We're TAUGHT to give up, because we see everyone do it, and we've swallowed the nonsense that only rapid weight loss counts for anything, and the unwritten rule that if you can't lose two pounds a week or at least something almost every week, you're doing it wrong. If you ever slip, you're doing it wrong and doomed to failure.
While no one TELLS you most of these messages, we learn them anyway by watching how weight loss "is done." We SEE almost everyone give up when the sucess becomes slow (and often it's not even slow, it's just "normal" but we're not taught to recognize normal weight loss).
We even "hide" normal weight loss, because we think it's so small that people will think we're cheating, will think that we're just lazy losers who don't want to admit we're not really willing to work for their weight loss.
I don't think people are unwilling to work for weight loss. I think they're willing to work hard for success and positive feedback, but they're unable to recognize the success when they see it. They give up because they THINK (and have been taught to think) they're failing so miserably that they're doomed to ultimate failure and might as well give up because they think what they're doing isn't working. They see failure where in actuality is success, just not the kind of success we're taught to expect.
My doctor really hit it home to me, when I was complaining that I "should be able to lose at least two pounds a week like a 'normal' person," and he told me that even at my weight (nearly 400 lbs at the time) that losing even the pound a month that I was losing, wasn't "poor weight loss" it was extraordinary weight loss, because most people don't do it. They give up and regain it, or they've stopped even trying.
Weight loss is like a huge marathon, and we tend to assume we're in last place (or at least the bottom 5%) when we see a thousand runners ahead of us. What we don't realize is the 20,000 people behind us.
Of course people give up when they think they're failing miserably, but the problem is that we're not taught to recognize success when we see it, so we're not giving up because we're failing. We're giving up because we have no idea that we're succeeding. We've been taught to see the failure, not the success.
So when people ask "how did you do it," I don't think they expect to hear magic answers. I don't think they want to hear that diet and exercise wasn't involved. I think what they really want to know (I know I certainly did when I asked successful losers) is "how did you manage to DO what you knew you had to? How did you stick with it long enough to succeed?"
People get annoyed/disappointed when the question is dismissed or answered with what they already know "eat less and move more." I know when people said that to me, especially with the annoyance obvious on their face, I wanted to answer (and sometimes did, at least with friends close enough to take the ribbing):
"No Sh_ _, really? Diet and exercise, huh? Who would have thought... Now, come on, do you really think I'm such an idiot that I didn't realize exercise and diet was involved? What I REALLY want to know is how did you do it 'this time' and not the thousands of other times you tried? What made it stick? What did you find helpful? What were the obstacles? How did you stay motivated when the weight loss slowed or didn't come off?"
Now when people ask me the question, I give the question and the questioner the respect they deserves. I know they're not asking WHAT I did, they're asking HOW I did it. They're asking "what made it do-able?"
And I tell them some of what I've learned
1. Take care of yourself, you're worth it
2. Don't try to punish yourself thin, it doesn't work (at least not for long). If you "pamper" yourself by imaging yourself owner and patron of your very own health spa of one, you'll have so much fun quitting won't even enter your mind. Quit eating and feeling great, who would want to give that up?
3. Recruit a support system (and I mention 3FC and TOPS, taking off pounds sensibly, the weight loss club I belong to).
4. Negotiate with family and friends, don't expect them to know what you need, and then label them saboteurs when they don't meet your needs. Failure to read your mind is not sabotage.
5. Nutrition is important. If you starve yourself, you're going to eventually binge.
6. Instead of "exercise" think "play" find fun ways to move. I tell them I have danced, walked dogs at the humane society, gone geocaching, bought and relearned to ride a bicycle, and swim because I love those activities. I even learned to enjoy walking on the treadmill and eliptical at the gym by taking my ipod along.
7. When "playing," remember to listen to your body's feedback. If you exercise to the point of pain, you're probably going to find it hard to stick with it. Learn to know when you've had enough.
8. Know that you're going to make mistakes and mis-steps. If you stumble a lot, it doesn't mean you're not ready for weight loss, or that you're doomed to failure. You can make several mistakes every day and still succeed. You don't have to be "good" you just have to do better. Just going from 20 mistakes a day to 15 will eventually produce results.
9. Weight loss is not the only goal. Exercise and eating better have loads of benefits that have nothing to do with weight loss, so if the weight isn't coming off - it's still no reason to quit. Just eating better and moving more (even without weight loss) is so good for your body, mind, and spirit that it's worth doing even if the weight isn't coming off, yet.
10. Look for those other benefits and focus on them. Because the number is never going to be as important as something tangible and real. The arbitrary number isn't nearly as important as increased health and stamina, and even appearance. You literally may lose inches before weight.
11. Focus on the success, not the failure. Focusing on the failure will tempt you to quit. Seeing the success will reward you and keep you going. That's why I have changed my focus from weight loss (which I couldn't succeed at every day) to "not gaining" (because I could celebrate "not gaining" almost every day, and even if I gained, I could celebrate what I've kept off (so when I gain a pound I still celebrate the 104 lbs I've kept off).
12. Take care of your physical, emotional and social needs (which is really what all the previous 11 are all about). Eat for nutrition not just weight loss. Get adequate rest. If you want to go out with friends when they invite you to a restaurant, go. Choose something that fits into your plan, or order the best choice (that you'd also enjoy) on the menu and eat only 1/4 of it. Talke small bites and chew slowly. Use "special" plates (I use tiny plates and even tiny silverware and it really does make it seem like I'm eating more). Don't worry about whether something is weird, if it works for you do it....
We act as if weight loss should be intuitive and easy, but it isn't. Our biology works against us, because no creature evolved under the conditions we now live. In a "natural world" overabundance of food is never a problem. When food is abundant, critters (including people) tend to breed faster and the surplus is quickly lost. Overpopulation occurs before widespread obesity. We're bred for famine, not for overabundance.
We have to learn to "mimic" the natural world we've lost. We need to exercise because we don't have to run down our prey or run to avoid being prey. We need to learn to limit our food intake, because we don't have competition from other critters and people to limit our food options. We were built to eat what we could find, not to pass up food when it was available. You ate what you could find today, because you might not find anything tomorrow.
Weight loss isn't easy or intuitive, and it's arrogant and cruel to assume that it is.