All of your assertions are false. Male wolves and foxes help with child rearing.
Aka Pygmy Men breastfeed (some men can lactate a little) Most Women outside these tribes don't look for it in a man. Whereas there's do.
Social Services does take children away from there parents and raise them instead.
It's only culture that says just the bad children.
Colonialism commonly took natives away to be raised by society instead.
The kibbutz movement used collective child rearing. They thought it was the only way for equality.
Nuclear families are mostly a western thing. Plus we see more and more young people living together in shared housing.some in a family atmosphere. Why not shared child rearing?
Of course if there are good reasons then someone can provide them righ
There's a difference between the minimal standard of raising a child to functioning adulthood, which is what orphanages generally manage, and raising a well-adjusted, emotionally healthy person who's not held back, having been given only the bare minimum of rearing.
All the research points to active parenting/interaction with children from day 1 being extremely beneficial.
We could also stop pressuring women to conform to male standards of behavior and economic performance and instead celebrate the fact that they alone are able to perform the sacred work of growing and nurturing new human life. Then the “problem” that policies like this are trying to fix simply ceases to exist.
"Sacred"? It of course has lots of satisfactions -- why would you have babies otherwise? -- but it's also energy draining and it can drive mothers to exhaustion and a feeling of isolation that can lead to depression.
And it's also bad for the fathers. Why wouldn't you want to spend more time with your kid? You made him/her, after all.
This is a framework to give both, father and mother, a choice. Nobody is pressured to take it, but they are able to if they want. That's the differences.
Effectively it does away a implicit pressure that the mother needs to be home and the father needs to work, i.e., the contrary you suggest. Celebration does nothing to help any side of this, if facing reality when bringing up a child.
Such improvements for equal chances allow to do that though.
As said, nobody is forced too, if they do want to keep the "old fashioned roles", for whatever reason, sensible or not, they may still do so.