Suppose you're trying to convince someone who hates rich people that he shouldn't rob them. Which is apt to be the more effective argument:
Yes -- but that's not the case with abortion, which is the closest thing to the issue we're discussing. In a sane world, abortionists would be poor, on the run, and frequently imprisoned for murder. As it is, they're very well paid, protected by laws and guards, and have a very powerful cheering section in the media, powerful politicians, and the Democrat party in general. Why? Because we've lost the moral battle over abortion.