I'm so glad that your doctor visit went well!!
I'm a doctor, so I have to say, I was a bit offended when we were all categorized as cold people.

Yeah, there's definitely some bad apples in the bunch, but we're not all that way!
Unfortunately, in medical school, we get very little education in weight loss, nutrition, and pretty much none in exercise. Sad, but true. I feel like most of my weight loss knowledge is from my own research and personal experience. I remember having a couple lectures on vitamins and minerals, but not much beyond that. But we certainly are educated in all the detrimental effects of obesity.
Also, a difficult aspect for most primary care doctors, is that usually appointments are limited to 15 minutes and there's a lot of pressure from administration to pack the schedule. So it's hard to address multiple issues and really have the patient-doctor relationship that most went into medicine for. And all this in turn leads to a stressed out doctor. No excuse by any means, but it definitely happens.
Thanks to everyone who stuck up for doctors! If you're not happy with your primary care doctor, switch to another. We're not so scary!