Anorexia and bulimia???????

So, i was wondering, if, from years ago, everybody saw 'fat' as beautiful, (instead of being thin/slim), then probably sicknesses like anorexia and bulimia wouldn't even exist, right? I mean, isn't it the way the culture is, right now, that is resulting in cases of anorexia and bulimia? People, everybody, saw 'thin' as beautiful, and the look of being fat repulses people, so naturally, there'd be people who end up striving to be as thin as they could possibly get, no matter how skinny they already are. If the culture of humankind was completely different, like everybody loved to look fatter, more plump, more fleshy, they such sicknesses wouldn't even exist, would they???