Ok. I will address just the 'core question' and ignore the digressions for now.

Why should they be rewarded? Because it is expensive to raise children. It's a social cost. It would inconvenience those who don't see value in children.

How about that? I am not taking it personally. I am..in fact..trying to use objective/non emotional language to the best of my ability as I realize that this is a sensitive issue.