on D:OS

That does not explain it all. Yes, we know women/men differ in their gaming preferences. I wrote two essays on it. But that's not the issue here. The issue is that some other RPGs enjoy higher % of women players than DOS.

Having said that ...I think your answer is valid. For example, I am yet to play DOS because I have a perception, most likely incorrect, that it is a highly hermetic, complex, possibly user-unfriendly game. So it is a mental investment that I always put off for a later date. All data shows that women are just not into such kinds of games, at least not until these have a backup plan (e.g. in Skyrim you can just walk around, enjoy the scenery, do puzzle/adventure quests).