Why? Its a law that’s long due for the discard heap.
I don’t know. Logically, it would seem the State (any governmental entity) needs to keep track of people born within it’s jurisdiction. Maybe not. Perhaps we could issue BCs but not allow non-citizens to declare their child as a citizen. I agree, the law has been abused to the point that it needs to be done away with. But we should think of any unintended consequences.