“If halacha allows but doesn’t require abortion (which I agree with Avram is a very rare case)”
It still doesn’t seem like you understand Avram’s “rare case.” He was talking about where the halachah would require it, but the medical professionals would NOT allow it if there were laws limiting abortion. I think this would be not only rare, but non-existent. If the doctor says it’s not necessary, the halachah isn’t going to require it.
The case of the halachah “allowing” abortion is something you’ve invented. This is pikuach nefesh, the proper lashon is “require.” We aren’t talking about a birth control heter.
As much as I’ve been playing devil’s advocate and defending the liberal posters here on this thread, I have to dissociate a bit now. I was defending the belief that political ideology shouldn’t be based solely on this issue. Those who are b’shittah in favor of abortion do not represent the Torah’s view and have likely been adversely influenced by secular, socially liberal colleagues.