Abortion should be legal, but the thing is that both men and women should be properly educated and responsible. Aborting for rape cases or sincere mistakes is fine, the problem is when it's used as a contraception method, or just abused in general by people who are too stupid to take care of a proper birth control.
In a decading society such as ours, where promiscuity and non-monogamous relationships is the norm, abortion is indeed prone to abuse.
However, banning altogether abortion would be a grave mistake on a purely pragmatic level. You won't stop people from fucking with each other if you ban abortion or even contraceptive solutions.
So my point is: educate people properly so the bare minimum would need to use abortion.