There are a metric shitload of decision points that people pass by before they hit the abortion one at the very, very end of that line.
People don’t go out to have an abortion for fun. They’re either being let down along the line of decision making by themselves and/or our (frankly shit) sexual education system, or there are complications with the pregnancy and it is deemed to be in the best interest of all parties to terminate. The point is that there are reasons, and as Frink said, the later it happens, most likely the more valid the reasons.
It needs to be allowed for the above reasons, but I’ll make it clear that nobody actually wants to have to go through that process.