How much do 'looks' matter?

Okay, that's fair, I guess. Now how many guys in a given male population would you classify as the johnny levers (approximately)? Because if that's a huge portion of the population, I am left with a super small % of mediocre-to-average looking guys who would **also **be secure enough to take on a confident, got a good head on the shoulders kinda chick. Because, cmon, **johnny lever?! **that's pushing it- he's incredibly hideous, no offence.