Judgement of Bodies....

"Healthy" is relative. The 250 million kids throughout southeast Asia/Phillipines who have or will go blind from vitamin A deficiency over the next few years would beg and plead for American fast food every day just so they have a better chance at appreciating sight. Folks prove my point beautifully when they voice opinions of who's in better shape or who's going to live longer based on looks alone.. Unless you're a doctor, this discussion of "who's healthy vs unhealthy" is irrelevant, and based on opinion more than hard data. This is why I choose to avoid opinion and use only stats and peer reviewed literature in my research.
Health is so, so very relative. 
Stop judging bodies.

Fat Stigma

No matter the size, fat or plus size models don't automatically equal sick or unhealthy anymore than stick thin models equal anorexia... we're all different sizes... all sizes of people have disease.
To specifically stigmatize and say fat individuals negatively influence us or specifically corrolate to disease is also a privileged view because much of the rise of "obesity" in the first world is linked to poverty, systemic racism, and the growing number of food deserts in urban areas.