The judgement and vitriol towards obesity on this last page or so in particular is so nasty.
I totally agree with the comparisons to anorexia. I have anorexia. I am afraid of eating, afraid of feeling full and hate the feeling of having food in my stomach. Eating makes me feel things I don't really want to deal with. Not eating makes me numb and means I can just focus on that and the empty feeling, not on anything more complicated. It's comforting and a coping mechanism.
COE and Binge Eating Disorder can have such similar feelings and reasons - so similar that they can be treated together. Sufferers can be afraid of not eating, afraid of feeling empty and struggle with not having food in their stomach. Not binge eating makes them deal with things they don't really want to deal with. Eating makes them numb and means they can focus on just that and the full feeling, not on anything more complicated. It's comforting and a coping mechanism.
Additionally, both types of self abuse can be a response to abuse and trauma - especially in people who are subconsciously trying to be conventionally unattractive to protect themselves from a situation they have gone through.
COE and BED and hugely more common than anorexia. It's not a stretch to say that a large number of morbidly obese people will have one of these conditions. And pretty likely that everyone that big will have either a physical or a psychological problem that's causing their weight.
Anyone who gets too big to fit in a theatre or plane seat has a bigger problem than poor diet choices or liking cake too much - that's more for people who are overweight or 'just' obese. In someone without a problem, being overweight might be easier than changing diet or 'worth' the food they love. Being morbidly obese and having their life severely compromised would not. The need to change would automatically kick in in a physically and mentally healthy person before it got to that point. That's why most people do not eat themselves to death.