Part of it, to me, has always seemed to be due to the institutional/personal divide. I enjoy watching people playing video games professionally, and yet as a feminist, I can say that it is ridiculously sexist scene. I can condemn the institution without condemning its members, and my saying it is a sexist institution is not my apportion blame; I simply would like to see the system improved.
Where's the sexism in e-sports? I don't really have a position here, I just wanted to know.
My gut feeling is that there will be a very high percentage of e-sports players who are men because the majority of competitive video game players are men.
See also: gamegate