The way a stranger’s body looks is not a license to voice assumptions about their *lifestyle® or the state of their health
I think that part is covered under “respect and dignity”. So, I already agreed with you on that point.
Basic human respect is not contingent upon health or the pursuit of it.
Sure. However, there’s a very big difference between saying generically “it is healthier to be the right weight for our height” and insulting a person about their weight.
The two need not be conflated.