Well murdering innocent babies is illegal already and I'm sure you won't find many supporting that
It is only illegal if they are outside of their mother. It isn't illegal if they are inside. Pretty sure that was covered.
What are the positives that would be gained if abortions were illegal? (Assuming we have some agreement on rape/incest/health)
You are posturing that if killing innocent people makes their lives better than we are doing them a favor? I mean all those refugees from Syria seem to have it pretty bad, we should probably just wipe the entire country off the map. I mean, some of them might live highly successful and happy lives. But, you know, statistically some of them won't. . .so let's just bomb all of them. Better that they were dead.
I'm of the belief that laws should be for the benefit of society at large. Abortion is currently legal. What gets better if we make abortion illegal?
Besides ending the biggest genocide since the Holocaust? During the Holocaust, approximately six million Jews were killed by Adolf Hitler's Nazi regime and its collaborators. Since Roe v Wade? Approximately fifty eight million unborn babies have been murdered. Even accounting for the one or two percent that fall under "life of the mother, rape, or incest" this genocide is nearly ten times worse.
I stand by the idea that we might be killing the next great innovators and peace makers. Abortion might eliminate the opportunity for someone to grow up who might develop a cure to the disease that you might eventually die from without treatment.