Be practical. EVERYTHING is rationed. Even health care from private insurance companies. Someone WILL make that decision. Whether it is the individual or their family or an insurance bureaucrat or a government bureaucrat. They WILL make it. Hopefully the individual and their family will make good choices that balance the care they get with the expectations of that care.
Look at it this way: should a person expect the insurance company to pay for a procedure that will extend their life for 6 months if the cost is $2,000?
Okay, what if the cost is $20,000,000,000 and the person will be in a coma the whole time?
I’ll bet that you are tending to say that $20 billion is too much in that case. Does that make you a supporter of health care rationing?