I’d assume it the bulshit is based on a different interpretation of the word “believe”. Some people mean “don’t need proof”, which is bulshit. Some people mean " investigate as if you thought it were true", which is not bulshit.

The fact that being overweight is generally unhealthy is not a sign of “anorexia crazy”, may be a sign of education tought.

I dont know how legit was the research methodology, but I did read a paper somewhere that even asymptomatic covid decreased peoples QI for a measurable ammount.