I think what they are getting it is that someone called it "pro-abortion". It is usually called "pro-choice", because it is abortion rights that most pro-choice people are in favor of rather than abortion itself.

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.