It's also said in such a way that the Mother/Daughter and Father/Daughter combination scenarios aren't even considered important. There is ample evidence that

It's also said in such a way that the Mother/Daughter and Father/Daughter combination scenarios aren't even considered important. There is ample evidence that single-parent children don't suddenly turn into werewolves or whatever terrible thing it is that is supposed to happen to them accordingly. The idea that a girl can't become a woman without Mom around, and boys can't become men without Dad around doesn't play out so well in the real world. Either gender has been shown to be equally good and responsible at parenting. And their kids, irrespective of gender, tend to turn out alright. Most of the behavioural identity comes from friends, and not so much from imitating mommy or daddy, anyway. People are so quick to join an us-or-them clique that they just can't get the concept of "equality" right. Divisions never break down when you build stronger and stronger barriers between the two "sides."