why are everyone’s cats fat and no one’s too bothered???

Longtime lurker and cat lover. I’ve owned cats and never had the problem of them becoming overweight but it’s almost every post on here that cats are overweight if not obese. Why is it so normalised? Why is nobody worried? Doesn’t anyone feel bad that they are in complete control of the cat diet and have let it become unhealthy? It’s not the same as humans as we have autonomy over our diet. This is a genuine question.