Which, a lot of the comments here, mine included, kind of support this, don't they?
Yep. Thin people go "I have no problem being thin therefore everyone should have no problem being thin." Fat people disappear into the woodwork because never once, in the history of their lifetimes, has this discussion benefitted them in the slightest. Mostly it serves as a poignant reminder that everyone around them is utterly devoid of empathy.