Yes, putting on weight is unattractive and a potential sign of ill-health, stress, and/or unhealthy diet. What’s so controversial about this?
It’s less of an issue for older people, and being modestly fat may be beneficial later on in life, but not so for younger men and women, although socially worse for women.
Whether anyone likes it or not, women are judged by their looks, which includes women judging each other and themselves, and spending billions every year preening themselves so they can actually look better than they really are. There’s the usual evolutionary psychology explanations for why this is, but I won’t bore you all with that.
Of course some people’s tastes and perceptions differ, but it’s just not healthy to put on too much weight, and I think it’s a bad idea to promote something that is inherently unhealthy with slogans like: “big is beautiful” and “beauty is on the inside” and other such idealistic little banalities that make me reach for the puke bucket.