It doesn't take into account the huge impact that peer groups have on kids. If you have any doubt about it, consider that our kids have the accent of their peer group, not their parents.
This.
That's why wmen who way "Oh, MY sons will all be feminists" and women who tell other women to raise feminists and all will be well, annoy me.
If it was so easy to teach sons to see women as human, then every woman since the dawn of time would have done it, right?
We won't crush patriarchy by raising feminist sons. Sure, good parenting is important, but it obviously isn't all there is to it.
(And I'd wager the kind of role model the father or in absence of a father, the nearest adult male relative is, has a very important impact. Nothing to do with mothering except insofer as mothers need to get away from abusive husbands asap)