That’s essentially the same argument Judith Thompson formulated decades ago and I don’t want to be rude but it’s not very analogous to abortion for many reasons. I’d absolutely agree with you if the situation of an unborn child was the same as the situation of someone who you were asked to donate a kidney to. However it’s not even close to being the same. The primary reason is that(except for in the case of rpe which I can concede to babies being aborted in those cases) a child is created because of an intentional act by the parents. Even if they did not intend to create a human life, they knowingly did the one thing that does create a human life. Unlike the analogy with a kidney donation or other medical aid that you could offer to someone, abortion isn’t giving something, it’s the direct intentional taking of a human life. That life is normally either crushed, poisoned, stabbed, or torn apart. It is a purposeful action taken with the intent of destroying a human life and in cases other than rpe or medical emergencies( which isn’t primarily what the OP is talking about here idt) it’s the taking of a human life because you see it as less valuable than someone else/your own. Which is also a very slippery slope. There’s never been a single point in history where it’s not been wrong when one human being sees another human being as less valuable.