Feminism isn't running around calling everyone sexist due to lopsided statistics. It's about giving women, and really all humans, an equal opportunity in life without fear of discrimination. When your main point is:

That even funny, awesome, compassionate liberals can be sexist.

Then I'm not even sure you're interested in having a discussion about this. Why not just have it so everyone just adopts an affirmative action type of deal with women to include them until history corrects itself? Nobody thinks this is a solution. Ignoring the socio-political reasons for this phenomenon will not get you anywhere.

The entertainment industry in particular is pretty much built on bias and preconceptions, so tapping into that market means fitting a particular niche or changing society's expectations of women comedians altogether.

You know that you have knee-jerk reactions when even the usual suspects in this community are looking reasonable.