I don't have any health insurance. What are "primitive practices?"
All lives are equal. There comes a point of usefulness, and I am sorry to say it, but where should the resources go? Someone laid up forever in a hospital bed be they 6 or 60 or someone who needs a leg up when they are 25 or 30 with two kids in tow?
I'd go with the latter.
That is what you are proposing. At one time we did it for the sake of our survival as a whole. To do it when there is abundance is just sick.
If we lack resources then we should make more. You seem to think it is some sort of zero sum game. It is not. There is plenty and more can be made as needed.
Your denying someone treatment will not heroically provide treatment for others, it just will deny someone treatment. Lying to yourself about "hard choices" will not change it.