Child support isn’t meant to punish a parent that’s no longer in the child’s life. Even if thats the end result, it’s meant to support the child.
Because of the bodily autonomy argument there won’t be true equality surrounding pregnancy because nobody has (or should have) weight of decision of whether to carry the child except for the person who does so.
But if a child is brought into the world as a result, it needs to be supported. And that’s the responsibility of the parents- willing or not.
I think that if male birth control becomes safe and available it will be much closer to equality.