There's not much they can do for a patient once that patient is admitted to the ICU.
Hospitals should have been setting up Covid wards, or tents. The hospital had enough time. Other than intubation there's not much. I guess if you are important enough you get those coveted antibodies that were donated, or blood thinning drugs if you have blood clots in your lungs.
I've never met a doctor who quit over ethics. I've seen many who quit over ego disutes, or pay.
In medicine there's something called Professional Deniability. American doctors gave it in spades.
I'm all for getting the idiots vaccinated, but don't buy the caring doctor quitting because he/she has a moral dilemma.
(I think American doctors are good, but caring no. Ethical just enough to keep them out of a Malpractise suit.)