I'm not sure it's that uncommon. Sites like mumsnet regularly have mothers trying to pull their kids out of this ideology while their husband's tell them they are bigots. And lots of divorced mothers with ex husbands who have gone full TRA. You just don't hear so much from them as mothers are usually (not always but usually) the primary caregiver, so it's somewhat easier for mothers to keep their kids out of this nonsense or extract them from it. It's when the mother is nuts and the dad is trying to protect their kids that it's harder for him, so we hear about it more.