We don't need to know this exact number to know that American patients are getting uniquely fucked by their healthcare system compared to every other developed nation. Once we're on-par with what other countries achieve, then we can have the philosophical debate.

This is a purposefully disingenuous hypothetical. There are people who have real shots at a better life, or continuing their life for that matter, who get denied the insurance they pay for! It isn't only people who are already on death's door.

The thing is, you have to start somewhere and then you can go backwards. And putting a price on what people should shoulder for other is the main job of insurance companies.

Now you can hope for a state owned one which would have "everyone" chipping in so you should be able to cover more extreme cases. Or you can (and should imo) criticize the algorithms used by the current companies. But you cannot expect society to pay for anything, you have to do some triage.