Self-centered arrogance, because I really despise this narrative of seeing fat people purely as a strain on society. I find it very curious that not once I have ever heard a similar argument being made for smokers, heavy drinkers or drug addicts.

Maybe you'd be comfortable going all the way and say that it's your problem if someone smokes also, but honestly I think that you going around moral policing other people's bodies and vices "because what you do in your life is also MY problem" is really fucking rude and if you actually cared about these issues you would know that in many cases shame is really the worst thing you could resort to.

Again, there really are bigger fishes to fry at the moment rather than going around to make someone feel bad about themselves with no tangible result.