I don’t care about what Rothbard said about it or anything (I have very little or almost no reverence for him).
But I would like to COUNTER QUESTION you.

So why don’t you try to answer that, when you offered a person lift in your car, was he having a gun in his hand with an expression that he is a looter or a contract killer willing to kill you? And if suppose he was someone you knew he may kill you (as in case of pregnancies where doctors warns that the pregnancy may cause extreme problems while there are 50% chances that pregnancy may be safe for mother).
So If the situation is, you doubt that the person you gave lift is safe or not, and during the travel, after sometime, you come to know that he actually is gonna kill you, he is dangerous, will you try to safeguard your *** against the bullets he will shoot in your backward creek? Trying to safeguard yourself may lead to his death you know! Self-defense is righteous because nobody is willing to die, it is clear to you isn’t it?

Second question is, what if someone shoots at your car and forcibly gets an entry? yes I am talking of pregnancies because of rapes. What if a terrorist stops you at midnight on road and enforces his comrade in your car? Will you try to save your *** because if the police sees you with the infamous terrorist or criminal or terrorist, they may shoot you too or you may get shot while police was trying to kill the terrorist or his comrade who entered your car forcibly?
Would you deny the fact that in such situation where your own life is endangered because of the person who forcibly took a lift in your car or whom you accidentally and innocently gave lift in, if you shouts or criticizes that person who forcibly took lift and try to get rid of him anyhow is righteous?

I consider it as righteous. I may try to get a good look of the person whom I assume to give lift, but even then, i may commit mistake in actually assessing if he is a simple honest citizen or a well-known hard-core criminal, terrorist, or killer who can very easily kill me during the travel.
And in the case of such mistake, I will certainly be entitled for safeguarding my life. its self-defense.

Abortion is LEGAL because it is moral.
Abortion itself is not immoral. Although the person going through the abortion may be immoral. That is a woman may go through abortion even when she actually didn’t needed it.
She may be mercurial deciding to have a baby at one moment and getting hooked and then after 3 months, deciding to have abortion. if she is such mercurial, then she is immoral.
But if she is not such, and she righteously needs an abortion, then it is MORAL!