There are three reasons why pro-life is such an unpopular position, even in red states, that most people are too polite to say out loud, but which make a helluva lot more sense than the explicitly stated reasons for being pro-abortion.
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Most people are absolutely terrified of the prospect of not being able to abort a cripple or retard baby. Throughout most of history, outright infanticide was often used to dispense with such profoundly burdensome people. And tbf, people can barely afford to raise a normal child in our dysfunctional economy, nvm a child who will never really "grow up," will always be as tedious to attend to as a toddler in terms of having to protect them from themselves, to say nothing of the medical costs.
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The nigger population would explode. No matter how much groid worship Baizuo engage in, no matter how much public self-effacing bullshit and BLM signs they put up, etc, even shitlibs are absolutely terrified of this happening. Hell, functional blacks are terrified of this as well.
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Only a complete degenerate would have an abortion of convenience, rather than of necessity. So why in the world do you want trash like that to reproduce, and to raise kids? They're only gonna resent and often abuse any kids they're forced to have, because kids to these people = no more fun.
You don't have to like it, or agree with it, but this is the subtext behind why pro-life is such an uphill battle electorally. Moreover, even if it is killing babies, most people don't actually have a principled stance against infanticide - sure, it's unpleasant, nobody wants to see it, but history and even third world countries today attest to the fact that a principled opposition to infanticide is a luxury belief.
Even a principled opposition to homicide is a luxury belief, as there are plenty of contexts where we're willing to kill people, even civilians. It's just that you can't have a functioning society where people are allowed to kill each other, whereas you can have a functioning society where people are allowed to kill their babies.
I've never seen a good argument against the legalization of abortion that wasn't a Christian religion based argument. (which I find wholly unpersuasive.)
I would also add a fourth reason to your list. If rape victims are impregnated by their rapists, then the mother should be allowed to abort. It is depraved to force someone to raise a rapist's baby.