There are many reasons.
In the case that carrying a fetus to term would kill the mother: abort. One life does not merit the safety of another.
In the case that a fetus was conceived in rape: abort. Would you remind yourself, and even be beholden to, evil?
In the case that a fetus would be born unwanted: abort. It is better to be born into a loving family than raised in orphanages or worse: raised in a family who do not love you.
I don't. You asked why would anyone. I just presented some reasons that I know my lady friends have stated.
I do, in fact, think that you don't "need" any reason whatsoever. I think a woman has every right to choose whether or not to have a baby including to abort a baby for any reason or even for no reason.
I think it's normal that different people think differently. I think this is a very flame-inviting question as it stands.
I've certainly met vastly more people who want to preserve Roe v. Wade because they want to preserve a woman's right to choose than people who want to preserve Roe v. Wade because they think that we need more abortions. I can't recall ever meeting someone who was actually pro-abortion.
Even those who think we should significantly lower the population almost always want to do that through better contraception, not through more abortions.
- that is semantics (if you want the choice to exist, you're pro-abortion, existentially speaking)
- everyone knew what the poster meant
- this is the least interesting conversation derailment folks could choose. Maybe instead go to bat against the raging anti-trans statement included for some reason?
In most cases it takes a man and a woman to conceive a fetus. But if the fetus is finally born into a baby, the consequence of that is rarely divided evenly between the man and the woman. In extreme but not really uncommon cases, the division can be 100%-0%: that the man bears no consequences at all and the woman bears all the consequences. Abortion makes the consequence close to 0, so that it's more even between 100% and 0%.
I'm not necessarily in favor of any specific case of abortion, or wanting more of them in the world, or anything like that. "Pro abortion access" would probably be more technically correct but that opens the argument up to getting derailed by "well how much access" and shit. Plus the mild transgressiveness of the term is helpful sometimes, if it makes people stop for a second and ask like this.