@freemo That’s a really interesting question! Putting my EMT hat on, if they’re competent they get to refuse an intervention but in practice those are hard calls.
More generally it kind of depends on other factors. For example, do you let someone ignore a mandatory evacuation knowing they may want to be rescued later at greater risk to all concerned?
It’s a thought provoking question. I’d lean towards answering “Yes” in the abstract and mostly in practice but I’m willing to believe there are circumstances where I’d be open to “No” and I can’t come up with a consistent limiting principle.