First off, your deduction is wrong because unfortunately your poor example already proves how women instead are not capable of objectivity (or at least less than men): all other factors being equal, unpleasant face already uses up some tolerance so of course there would be less left available compared with pretty face which can start on full bar.
Secondly, if you are (a pretty face, slim and fit woman who is) really able to take advantage then why would you even be disguising your complaint as a question like this?