Just as soon as you find me any polling data showing that pro-lifers at large think women should not be legally liable for abortions because they "don't understand what they're doing!" FYI, even the Catholics (CCC 2270-72), Eastern Orthodox, and many Protestant denominations, excommunicate women for the sin of abortion.
A woman is only excommunicated if she does not repent and ask forgiveness for the abortion. A woman’s “punishment” comes with the loss of her child, and she lives with that for the rest of her life.
And there are so many pro-life groups that reiterate the woman is considered a victim in abortion. You do realize that Planned Parenthood, for instance, does not tell the mother-to-be the side effects of an abortion. Nor is she provided an ultrasound with the image of her baby prior to the procedure. Imagine going in for a valve job on your heart and no one tells you what might come of it. Everyone should be told of the potential for a broken heart.
And I’m not familiar with polls being taken on this subject matter. But here is just one pro-life group out of hundreds with their explanation:
http://marchforlife.org/no-pro-life-american/