Fit also does not equal shitlord.  We are entrenched in a fat accepting/coddling society. So many people are fat that those desperate enough for sex or a relationship settle for anything.  People don't feel like they're doing anything wrong because sometimes you can't help what you weigh (you can) and that being overweight doesn't necessarily mean you're unhealthy (it does).  It's society that's wrong. Not science.