Now, I wish that was all I needed to say. But, the point rather cogently made by the comic above is that that isn’t good enough, that an unexamined “it just happened that we were all men” is never good enough. All of us, men and women both need to examine whether they’re being that guy in the comic. A lot of people seem to have picked up the idea that if you didn’t mean to be sexist (racist, etc.), then you weren’t. That is, that sexism is a deontological problem, not a teleological problem. As long as they don’t catch themselves being sexist, they are safe.
The quote references this comic.