I think our society shames bigger bodies in general when compared to the norm. One might call someone fat and say they are overweight. But overweight to one might be healthy for another, it is subjective to body type and many other factors.
I would be healthy if people stopped worrying about their size and more about their health, what they eat, drink, snack, etc. Even small people can be unhealthy it is just people tend to be blinded by size and think that the size of a person tells all about their body.
I think fat acceptance is only wrong when they say "eat whatever you want, it doesn't matter" because it does matter. I think it's pretty terrible that so many people in America die from heart disease, which is preventable with a good diet. It just seems like something that in many cases is so easy to prevent is so widespread.
I sometimes feel that fat acceptance pushes other issues under the rug. But it is important to learn to love your body nevertheless. Society does shame bigger bodies a lot, not just "fat" or "obese" people.
This is running on but basically, I agree with you the most important is personal health. My healthy is a different size than another person's healthy. "Fat Accpectance" is good in that it does to an extent acknowledge that there are many other body types out there but it is bad in that it doesn't acknowledge the causes of obesity and the fact that Americans waistlines have been steadily increasing over the years.