This whole episode is the first time I have ever picked up on a gender discussion in relation to yc applications. The general feeling here seems to be that some type of affirmative action of quots needs to be applied. But there already is a quota - those with the most promising teams and ideas get to go.
The last thing a successful female founder wants or needs is a quota or lower bar of entry for things like yc. Because once that happens, you're going to have to work twice as hard to get respect, because now you have to prove your place wasn't just because the quota needed to be filled. if you get picked fair and square, then being there is a strong signal that you are worthy.
There are times and places for intentionally creating diversity, but a start up incubator is a bad fit for that type of intervention.