One thing I think they don't get, or care about, is the personal and societal consequences of having to keep unwanted pregnancies - mainly how much it makes life more difficult for everyone involved. And that with the difficulty, it comes degraded social relationships, unhappiness, substance abuse and crime.
Another thing I think they miss is that lots of people will have abortions regardless. Affluent people will have the safe abortions, and the less fortunate will have risky, potentially life-threatening, horrible abortions. Where there's a will, there's a way, so again, crime increases, and the desperate women's health will be in danger, becase the procedure has to go unchecked.