I think that one problem that arises is the assumption that men have one opinion, and women have another, on this matter. The moment it turns from "Some men/women think this..." to "(All) men/women think this..." the statement itself becomes the problem.
As a woman, I don't like men telling me what I think, or what I should think. I also don't like it when other women act as though they're speaking for me.
Men may not have shared my experiences, but neither have other women - they can speak for themselves, they can even speak for their friends whose opinions they know, but the minute they claim to speak for me simply because I'm the same sex as they are, they're guilty of the same traits as they're accusing others of having. My opinions and life experiences are not solely determined by whether I have XX or XY genes.
The same applies to any suggestion that someone is not entitled to have, or express, an opinion because of their gender. Our opinions are formed not just by personal experience, but by what we witness, what we read, what we're told.
Finally, as a forum moderator, the rule is "no sexism". We believe in equality here, so this applies in all directions. Discussion of sexism is fine, sexist discussion is not. And nobody has received any kind of official warning yet, so consider this a pre-emptive message.