These are not one in a billion medical cases.

Pre-eclampsia is one of the most common causes of death in pregnancy. I think it is found in around 1 in 25 pregnancies.

Ectopic pregnancies are also quite common. I believe they count for 1 in 50 pregnancies.

Have you not been paying attention to what is going on concerning pedophiles and children being trafficked sexually? And even disregarding child sex trafficking, young girls are way, way way too often targeted by sexual predators.

The only example I listed that is super rare is Tay Sachs. On average, less than 20 pregnancies a year in the US have a Tay Sachs diagnosis. The average yearly number of pregnancies in the US is around 4,000,000. So 20 pregnancies out of 4,000,000 getting a Tay Sachs diagnosis each year is still much more often than one in a billion. It's about 1 in 200,000.

How are my posts derailing the consensus that abortion should generally be illegal?

All I've done is point out that there are cases where many people would support terminating a pregnancy. This was in response to posts that were dismissive of cases where the mother's life was in danger. The cases that I've brought up are a drop in the bucket of the number of abortions performed. So it doesn't jeopardize the consensus here that abortions should generally be illegal. The key word is "generally".

As I've said before, my goal is to get people to think about things from different perspectives, have empathy for others, and become more knowledgeable about things that they have strong opinions about.

Which of those motivations do you disagree with?