Eh, as someone who came from a social background where I could have lost all of my friends and had my family disown me for siding with the "baby-killers", I understand why they would hedge. In some social groups, the only acceptable way to say that you're pro-choice (even though that's what you're actually saying - you're pro-choice but you'd exercise that choice to carry the fetus to term if it ever came up, or at least you think you would) is to weasel around it with a "well, of course I think abortion is wrong! It's terrible! But do I really have the right to change the laws to suit what I think...? What about rape, incest, backalley abortions, lesser of two evils, etc. etc.".

Now that I'm out of that situation I can unapologetically say "pro-choice", but the social repercussions for doing so can be severe, so I don't judge someone who won't just come out and say it.