They can and should.You're missing the point that many anti-abortion positions are based on the duty of the state to protect individuals. And since nobody can really define when an "individual" is formed, is why this is such a difficult issue. This is the cleanest way to put it, leaving religion and other biases out of it. To say it's solely a healthcare decision or solely a women's rights issue is not portraying the issue fairly. Not saying that's my personal view, only that other views exist and can't just be so easily discarded.