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.

The point is that overeating won’t make us happy either. Maybe it will give some 15 seconds of gratification but then most of us will feel guilt, and the long term effect has terrible consequences. Maybe the problem lies also in the fact that our simple brains can’t really understand the future. I’ve read somewhere that many asiatic languages don’t have a future tense, hence people there when facing the choice of eating something think along the lines “if I eat this I AM fatter/less healthy” and this could be a factor in the way lower obesity prevalence.

I don't deny that. Some get unhappy enough to derive enough energy from this unhappiness to tackle this as a real problem. Of course the first box you need to tick to get better is to accept your behaviour is problematic and realize that it makes you unhappy in the long term.

Some might never reach that step to begin with. Many however realize the problems and want to get better but they can't because they constantly fight the symptoms and not the cause, or because their lives give them enough excuses not to do it (whether they are valid excuses or not doesn't matter too much).

I chose to believe that people are a product of both their environments and their own choices. So we are neither completely determined by the circumstances we grew up in nor are we completely free to decide to "just" do things 180° different than we were lead to believe our whole lives. We can shape our environments and ourselves within certain boundaries and over given timescales, but for this we need to know the forces which act upon us. And everybody has forces acting upon them, the believes, rationalizations and stories we tell ourselves about our place in the world are partly a product of this: we try to be happy with ourselves in the place that we have within the universe. We try to establish meaning in the chaos.

This is why explainations like "some people are just lazy" is less of a true statement about the world, but more of a true statement about the stories a certain type of person has to tell themselves in order to feel good. Because if the weren't "just lazy" suddenly one had to reflect upon the environment, the incentive structures that shaped them into the way they are. Suddenly one would feel the ethical need to change said environment and feel powerless confronted with the scale of the problem. Nah. Moar better to say they are "just lazy", then one can stop thinking.