Since 1971, Catholic hospitals have been guided by the Ethical and Religious Directives , which detail religious and moral justifications for care extending from conception to death. The interpretation of those directives is the responsibility of ethics committees at the hospitals, and the final arbiter is the local bishop. [emphasis mine.]
Stop and read that again. Who is the final arbiter concerning necessary, even life-saving, medical procedures? A bishop?! Are bishops doctors? Doctors in every possible specialty? No. Are bishops chosen for their unique understanding of diseases, conditions, medical procedures and the like? No. Are bishops ever likely to face a life threatening pregnancy or gynecological issue? No. Are bishops even likely to closely know anyone facing a life threatening pregnancy or gynecological issue? No.
In other words, bishops have no knowledge or training that would make them more able to make such a decision, certainly no more than the woman herself, her doctor, or the ethical board of a hospital, but bishops are the final authority in such matters. And you, or someone you love, may very well find yourself at the mercy of such a man, with no other option available to you.