You missed my point, and it comes back to the whole question of what "equal" means. We all agree men and women are equal in value, but it doesn't mean they are intended to do exactly the same things in life. For example, it's obvious that women have babies, and men don't, so far.
In exactly the same way, mothers and fathers are equally vital to children, but do not meet the children's needs in exactly the same way, or at the same times. An interesting book on the subject is "Fatherneed," by I forget whom. Moms and Dads are just different!