IMO the problem is that we expect at most 2 people to share the responsibilities of parenting, when we should be sharing that responsibility across like 20 people or even more.
The idea of one or two people solely raising a child is insane, for most of human history children have been collectively raised by the tribe/village.
We’re not solitary predators god damnit, we’re one of the most social species on this planet! If even cats share the responsibility of raising children whenever they’re able to, it should be pretty clear that we’re not made to raise them on our own either.