Perhaps we are evolutionarily programmed to avoid people with impulse control issues?
I understand that it's not that simple, and someone's physical ability has nothing to do with intelligence in the real world. Unfortunately we're all subject to making split second judgements when interacting with strangers and as a result people don't think deeply about how that impacts those they deal with (or don't care).
Women in every single culture have much thinner waist hip ratios than the male counterparts, suggesting that men like them thin.
If we are wired to detect something doesn’t mean it has to be a first order attribute. Isn’t fat now versus fat then.
Gambling, addiction, setting fires, fighting, chronic lying, etc… some of those are first ordered detectable and some maybe aren’t.