“Why take the pill if your goal is not to kill the already-conceived child?”
Because you don’t know if the child exists. It’s the difference between firing a gun into the ground so that the bullet might ricochet up to hit someone and shooting someone in the back of the head.
Then there is habeas corpus.
No. It would be like firing a gun in such a way that you know that if a person is standing there it will kill them.