That would open a whole can of worms. What if some society says black skin is a disability so black people shouldn't be allowed to reproduce?
I'm going to put it another way. Does this really pass your own personal sanity check? That parents should be allowed to:
- Amputate their children's limbs (Various developmental defects
- Remove their children's eyes (Blindness)
- Perforate their children's eardrums (Deafness)
- Remove their tongue / vocal chords (Mutes)
- Paralyze their kids (Various forms of musculoskeletal issues)
- Inflict brain damage on their kids (various forms of intellectual disabilities)
Here, I'd probably have that be legal. Not because I approve of it, but because the alternative, regulating who gets to reproduce, is worse.
I left it out intentionally as while I personally think it's in the same category, it's unfortunately sufficiently normalized as to pass without question.
As for the existing cases of child abuse, we've already got things for that. We have anti-child abuse laws and their like. They're not perfect, but they denote a line of behavior beyond which is not tolerated.