Anyway, the point was that being ok with being obese because you are happiest eating a lot doesn’t make eating less any more complicated. It’s just choosing to do something different, which everyone is free to do.
Similarily it is totally easy to imagine getting fit/slim by ignoring the forces acting on someone who is obese. Of course one can do that if it fits with ones world image, but I tend to like my models closer to reality.
Don't underestimate what it does to a kid if e.g. one parent has troubles expressing love through any other means than cooking. Suddenly love comes in the form of food. Similar with situation where ancestors nearly starved — this can fuck up multiple generations. Both examples will take conscious effort to tackle one's psychological drivers, maybe therapy, but quite certainly a lot of time and effort.
Think about a bad habbit you tried to loose and multiply it by a magnitude then you get a glimpse of what this would feel like for an actual obese person (note: I am not obese, neither have I ever been obese). This is why "just eat less and move more" as a statement is ridiculous: a bit like "have you just tried not to be poor" or "have you tried not being depressed all the time". While factually correct it displays ignorance of the forces at play.
If the part I don’t understand is that there is no such thing as being overweight and happy, and people who feel that way have psychological defects, then it’s not that I don’t understand your point but I do disagree.
Most obese people are not happy with their body or the ways their eating habits impact their live in many ways. Most obese people are also happy when they eat or worse: they are unhappy when they don't eat.
If eating gives you a short term improvement even if it makes you unhappy in the long term then you might just do it, like in any other addiction (btw. a well researched topic).
The way out of this is not to "just eat less", the way out of this is to tackle the reason why you only can be happy when eating and then eat less.