For centuries we've taken kids away from their moms and handed them off to wet nurses. A woman is useful, but society has developed a lot of ways of making sure

For centuries we've taken kids away from their moms and handed them off to wet nurses. A woman is useful, but society has developed a lot of ways of making sure the bio-mom isn't the only one (very logically given our historically high maternal mortality rate). Our current nuclear-family setup is only possible because of improvements in sanitation and medicine.