"Legal murder" is the same as "married bachelor."
No it isn't. A "married bachelor" is an oxymoron. "Legal murder" is what happens in an abortion. That is not an oxymoron, that is what an abortion is.
Your logic here seems to be "No one would ever legalize murder. If abortion was murder, then abortion would be illegal. Abortion is legal, therefore abortion isn't murder." I am here to tell you--it does not work that way. A things being legal or illegal has no bearing on what it actually is.
So do I - as far as anybody has been able to prove, morality exists in the mind of moral agents, and nowhere else.
Except when the moral relativist says so. Theft isn't immoral--until you steal from the moral relativist.
Strawman, and loaded question.
I think that abortion is OK because I am of the opinion that a pregnant woman should not have to continue to be pregnant, if she doesn't want to.
And I am of the "opinion" that a woman who did not want to be pregnant, or was uncertain about a pregnancy should not have chosen to get pregnant in the first place.
If the woman made a responsible "choice" she would not have gotten pregnant in the first place.
There should be no reason for an abortion when no one is demanding that women get pregnant.