Men have been constantly culled en masse so they're selected for cooperation at war. Women only failed to individually reproduce if they weren't sexually attracted to the invaders that killed the men of her tribe. This has obvious consequences.
This is simply factually wrong at the relevant level. Plenty of examples of Y chromosome replacement events; zero of mtDNA replacement. Women gladly mix with whoever conquers their group. Example:pic.twitter.com/bfe4ERsNBm