Earlier quoted context omitted.
In this case are clearly not under represented if you reflect that PG also says they wield genuine power at YC.
Uh, pg straight up states that they are under represented. "While 3 out of 12 is not 50-50,"
http://www.discovernursing.com/men-in-nursing
As long as the ratio isn't much worse than 3:1 (men or women are at least 25% of the workforce) either way I'd argue that it's a pretty balanced work environment all things considered. Shooting for 50/50 equality would potentially make more inequality problems than it solves, just for a different subset of the population.
In other words in nursing if you paid men 2x what women make you'd sort that shit out it quite a hurry and get a bunch of dudes helping take care of people. I'm not sure you could find anyone who would agree that it's an equitable or desirable way to achieve the "right" outcome, though.