Because people have a right to bodily autonomy. It's not absurd at all. What's absurd is the naturalism fallacy. You could say the same thing about building skyscrapers or treating cancer. Dying of cancer is a natural process of the body, why should anyone disrupt it? Absurd!
It shouldn't surprise anyone that many people seeking abortions are using contraceptives - they didn't want to get pregnant, after all. Contraceptives are reliable but not infallible. Abortion happens everyday in a society of hundreds of millions, but contraceptives failing is rare. It's not really any more surprising than a handful of people getting struck by lightning every year, even if it's more morally and politically charged.
It shouldn't surprise anyone that many people seeking abortions are using contraceptives - they didn't want to get pregnant, after all. Contraceptives are reliable but not infallible. Abortion happens everyday in a society of hundreds of millions, but contraceptives failing is rare. It's not really any more surprising than a handful of people getting struck by lightning every year, even if it's more morally and politically charged.