I am quite familiar with the systems in other countries. Every country rations care. Some do it by condition severity, others by ability to pay. The vast majority of US consumers have health plan coverage and the co-insurance or co-payment amounts are fairly low. I won't attempt to defend the vagaries of the US healthcare system but let's not pretend that everyone who needs treatment in other developed countries actually gets it in a timely matter. Why are 5-year cancer survival rates higher in the USA than the UK?

It's pretty common to see affluent Canadians come to the US as medical tourists and pay out of pocket for procedures like MRI scans or joint replacement surgery. This is a real thing that happens all the time. Depending on your perspective that might be acceptable in the name of fairness and cost control but there are always trade-offs.