I'm more than confident you don't mean to imply that a child gains benefit specifically because a biological man has an outie and a biological woman has an innie and because innie and outie go together and that that's the "love" that only a man and a woman can have together in that particular "arrangement" and that, again, a child benefits from that.
So, since a child's life isn't impacted by the specific configuration that a penis and vagina can happen to join in, what do you mean?