It shouldn't in general, but there are restricted cases where it's literally life and death and difficult/impossible to plan around.
I would not say it's only acceptable for unintended shortages, or maybe very brief and rare shortages since those tend to be the kind you can't reasonably plan around.
As for saying the AMA kills people, not sure I'd go that far without doing more research. But I wouldn't be at all surprised if the effect of some of their policies is more deaths than there otherwise would be.