Even when blatant and caustic child abuse is part of the equation?
(And,yes,it *is* child abuse)
Here is my problem. I'd like to err on the side of individual freedom. Now we have to balance freedom and the rights of children. We have some measures that are fairly objective: medical neglect, bruised and broken bodies, etc.
You want to go to a place that is subjective. I wouldn't want my grandchildren raised in a homosexual home and I wouldn't want my grandchildren raised in a single mother home with boyfriends moving in and out, and frankly, I'd be very upset if my husband divorced me and had sleepovers with girlfriends when our son was staying with him!
I'm not inclined to legislate that X circumstance is inherently abusive. That type of law is wholly subject to abuse by whomever is in power. Today, it might be gay couples and sleazy moms and tomorrow it may very well be Christians, homeschoolers and conservatives.