What's different is an addictive pattern.
If someone kept running into the street, even after getting hurt, even after being told they were risking their life, we'd think something must be wrong with them, wouldn't we? Because it doesn't make sense. If someone kept having unprotected sex with strangers they meet in any old bar, we'd think something must be wrong with them, too. Because it doesn't make sense.
So the same thing is happening with binge eating. You get going, and all bets are off.
Sometimes counseling with someone who specializes in eating issues can be helpful in sorting this out. But as with any addictive pattern, the best short-term solution is, Don't Start.
Good luck!
Jay