Having abortion rights easily accessible for everyone aka general human rights benefits everyone and should be an extremely important issue to care about, not just people who are able to give birth and it affects nearly half of the country. First of all, even if you're personally not affected by it, chances are you'll have loved ones who are negatively affected by anti-abortion activism, whether it'd be your parents, friends, co-workers, etc. Secondly, serious medical complications arise from people who are unable to get access to contraceptives and abortion, which hospitals have to care for and thus are a strain on the economy and adds extra burden to our healthcare system that could have been easily avoided had they had access to it. Thirdly, you should care about ethics even if it doesn't personally affect you or your loved ones, we shouldn't look the other way when child labor exploitation and slave labor is used to grow our food and products, animal abuse is rampant in the meat industry, multiple wars occurring not just in Ukraine or Israel but in Ehtiopia, Sudan, the treatment of minority groups globally, etc. None of these issues occur in a bubble, and abortion rights is inherently tied to other medical necessities such as contraceptives (there are people who need it to control their PCOS), vaccines (the whole hullabaloo about using aborted fetuses is a cornerstone of the anti-vaccine movement).
Not to mention the crux of the anti-abortion movement is, and always has been, exerting control and influence over women's bodies. It's a women's rights issue as much as our suffrage, our wage inequality, etc.
I'm not saying abortion is not important, I think it is important, just that there are other issues even more important than it. As for which politicians while I'm not not saying the Republicans/MAGA cult aren't much worse, a lot of the time the Democrats, such as Harris and Walz have spent like a third of their campaign talking about abortion and Roe v. Wade like that is the definitive critical issue and vastly more important than issues like income inequality, global warming, housing prices, etc., and my comment about never having kids so not being impacted was just a tongue in cheek way of indicating that that I would already find that as a flaw in these campaigns even if I did want to have kids, so one can see my perspective when I'm not going to.
Not to mention the crux of the anti-abortion movement is, and always has been, exerting control and influence over women's bodies. It's a women's rights issue as much as our suffrage, our wage inequality, etc.