I think it's fine to target primary women or primarily men, it's tangential to being sexist or being shitty, you can do both, do neither, or do only one.

It's just that a lot of niches targeting men are already occupied and enjoyed by the players (probably of all genders), because men tended to be considered the main audience, thus creating a self-fulfilling prophecy as women felt left-out and rightfully.

On the other hand, I'm not a woman and may be completely wrong in my opinion, and would be glad to hear from someone who knows how things are, not how they seem to be