This whole thread is quite exotic to any civilized country. In Universal Health Care countries, you don't have to worry about health insurance. You can't even escape it! Minimal or no waiting lists, free or almost free unlimited health care (procedures and/or meds) at the point of use (but there are taxes, of course).
Swedish UHC has for example found and cured my prostate cancer. Imagine: suspicious lab test, repeated, ultrasound examination and half a dozen of biopsies, still no firm conclusion, another set of biopsies which confirmed the diagnosis.
Already at this point, imagine the financial problems of a run-of-the-mill US citizen.
Well, I could now chose between surgery and radiation therapy. Surgery had practically no waiting list, but would almost certainly lead to impotence and urinary problems. Radiation might cause the same problems, but then you'll still have the op option.
Radiation uses expensive equipment and very well educated personnel, and summer interfered with their schedules. My case was not terribly aggressive, and well contained, so I chose a month of waiting.
Pre-medication hormones carried a label of a couple of thousands of dollars. So what! We never pay more than some $220 per year for prescribed meds. (And the maximum for tests, visits and procedures is, like, $110.)
The first set of radiation consisted of 18 darning needle size things being pushed through my bottom into the affected gland, and radioactive substance introduced to where the ultrasound had found the cancer. I'm generally very curious about medical procedures (I'm a professional medical translator), but I'm rather happy that I was too sedated to have a look at what happened.
I was released after a day in hospital, and later returned for some 13 sessions of radiotherapy in those monster machines costing millions of dollars.
Like I said, $110 max per year for any and all combined procedures.
Recent lab tests suggest that they cured me. There will be follow-ups for a year or two.
Any political party or group suggesting a change away from our UHC system would be dead even before headlines were printed.