so what? It is on their dime, not yours. If i'm a 90 years old and wanna drag my existence out it is my choice as long as i'm paying for it, directly or through insurance (and Medicare is an insurance too btw)
It is easy to suggest to terminate lives earlier when it isn't your life. History is full of such attempts.
One should be glad that such a large sector of economy - healthcare - has a great stable demand and a great labor market. Overwork - teach more nurses and doctors. The issue is completely self-inflicted as the labor supply is artificially constrained:
"In 2023, U.S. nursing schools turned away 65,766 qualified applicants from baccalaureate and graduate programs, according to the American Association of Colleges of Nursing (AACN)"
Most people who are old today (or in the last few decades) probably wouldn't have thought about it because it wasn't something that affected their parents who likely didn't live that long in the first place.