People will get abortions whether they are legal or not. If they are illegal, they will be much more dangerous; that means more deaths from "back-alley" abortions. More people will be criminals and that means higher law enforcement costs, jail costs, and/or crime rates, which makes your (city, state, not so much in the case of a nation) less desirable and hurts economic activity.

As of a few years ago, when we covered this in one of my classes, the average age of an abortion providing doctor in the United States was over sixty, because any doctor in training is allowed to opt out of learning the procedure, performing it is emotionally taxing and a threat to one's livelihood, and most of those motivated to perform it are those who were adults before Roe v. Wade and remember what it was like before it was legal.