Just wanted to add my 2c
I absolutely agree that childhood trauma and abuse, possibly young adult trauma too, can result in disordered eating. Also agree with the poverty connection, processed food is cheap and paleatable (and toxically addictive), so often times poor parents will feed their children this and it starts the lifetime of addiction.
Focusing on people's appearances to shame them is not the answer. While an addiction to food/disordered eating can and often does lead to weight and health issues, sometimes it doesn't result in any visible changes.
In all honesty, i still suffer from disordered eating - the only difference is that my type a personality and desire to avoid toxic chemicals make it so that i binge on fruit and veggies instead of processed food. It's practically impossible to be obese when eating that kind of stuff, but do i still have the issue of wanting to stuff my face constantly? Absolutely. Something about what i do being seen as morally "better" than what some one else does just because the results are not visible rubs me the wrong way. It's still disordered eating.
(And, for what it's worth, if we want to get into any kind of deeper or spiritual implications, i am absolutely being "punished" for my weakness/addiction. During pregnancy my body cannot tolerate fruit at all, even low glycemic fruit like berries will shoot my blood glucose levels up to dangerous levels. For someone who is addicted to binging on fruit to not be able to eat it for months is real torture. On all the mom support forums everyone is talking about how they can't wait to have some cake again or other processed stuff, and how they hate having to eat "healthy", including fruit. Meanwhile i want fruit so bad i wake up having dreams about it, literally.)