Unfortunately, I do not think there is actually anything nefarious going on.
It might be as simple as women being emotion driven, when it comes to music, so the fact that it doesn’t "sound" perfect is irrelevant. They get what they need from the music itself.
Something very nefarious and sinister is indeed going on. Only just not the way you think. What you just said is, finally, very sensible. Most of it, anyway. Save for the one unfortunate word. Everyone knows men and women are very different creatures with very different interests, inclinations, and abilities. There’s a tremendous amount of overlap but the differences are at the extremes, something every single one of us used to know and take for granted - until the nefarious sinister stuff came along.
That it is indeed nefarious and sinister is revealed in your one word, "unfortunately". This one word gives away the game. What in the world is "unfortunate" about people not being all exactly the same?
Think about it. Because the next question is, Why would anyone want to make us all the same when we’re not?