I agree that the instance is so rare as to be inconsequential. The situation would probably be so grave that the mother would be at just as much risk, termination of the pregnancy notwithstanding. This is why the abortion is suggested before the situation even arises.
For instance, my friend developed a clotting disorder after her sixth one which made her seventh a very dangerous situation. She had to have heparin shots all the way through. Both came through with flying colors. Another doctor would have advised a “termination” of the pregnancy because of the risk. A disaster would put a doctor in danger of a malpractice suit, and our society is malicious enough to go along with that. It’s a self-protective instinct on the part of the doctor.
It takes an especially brave person to beocme an OB, not just an OB, but a pro-life one who would put themselves in such jeopardy. This is the brave new world we have carved out for ourselves, folks.