As an American with a sister with thyroid issues, I can say that is absolutely not true for the majority of Americans. People are mostly sympathetic to those who are not obvious slobs.
Maybe once they hear the story, but most people assume every fat person they see is a slob
Everyone benefits from you being fat. Your doctors, your car manufacturer, food manufacturers, everyone. Except maybe health insurance. But they're not hurt too too much.
There's plenty of doctors and surgeons who wish there were less fat people, because they enormously complicate doing surgery on and managing in hospitals.
I agree, but this isn't how incentives work.
Ultimately, there are billions of dollars at play here that rely directly on obesity. The mechanisms of the market and human behavior transcend moral judgement.
What about everybody that works in liposuction?
They want to "fix you," too.
The car industry is a huge one. Making people drive everywhere means more car sales, more fuel sales, more infrastructure built for more cars. And it also makes you fat as a side effect.
I think there's sufficient reason to believe that "Overweight = bad" is a common standard that at least people hold themselves to.