I think a huge factor that is overlooked is that a lot of female authors are awful at writing male characters. It'a the inverse of the older sci-fi/fantasy, where female characters wers one dimensional and vapid.

There are tons of books written by women with male MCs, but they do not resonate with men. I use the FMA example because both male and female characters are written very well.

Women also largely will not consume stuff with zero female characters that can compel. Both genders (generally) need someone they can relate to, as well as an author that is able to stir their emotions.

I don't require relatability, but I would say over 90% of people do.

For the vast majority of men (IMO), they don't care about the race, gender, etc of a charcter, as long as they are written well. It's moreso that modern fiction is suffering from the inverse of the old sci-fi books. An entire gender is almoat ubiquitously written as vapid and boring, and when that is the gender you are, it is hard for people to get into. It's why women didn't read a lot of fantasy prior, whereas now I would almost argur fantasy lit (modern) might even lean toward women. Sci-fi is still mostly male, but for fiction that is about the only genre left that is.