It’s not the “best” servers according to studies, it’s often the most attractive and non minority servers.
I don’t have any opinion either way about his conclusion/opinion but this is the first article I could find. I first heard about this on Freakonomics
For me as a syseng that's getting enough sleep, staying ahead of my field and basic hygiene. I'm not in the best health but I'm also not in a position where I can get a lot of people sick.
I'm overweight and as a result my skin is terrible. Not so much that people notice but I certainly don't think that I should have my hands in anyone's food.
I noped on out of there. No thank you.