Most Americans either severely overestimate our healthcare or severely underestimate it. Republicans tend to think our quality of care is lightyears ahead of other countries (if you can afford it) which isn't quite true, it is probably a bit better yes if you're rich but it isn't anywhere near enough to where we should be worried about decreased quality of care. Democrats seem to think if you're poor we literally just let you die which also isn't true, and medical bills are effected by bankruptcy in worst case scenarios too. If you have any sort of 'real' insurance (there are things people sign up for that are kind of like insurance but not really) you can definitely get most of your problems solved, you still might have to cough up some money but you'll definitely not just be left to die. Also the humongous 'invoices' that people show on the internet are 1: what is meant for insurance companies since hospitals overcharged insurance companies because of a war between hospitals and insurance (largely the insurance company's fault) 2: Would not even be close to what you'd pay if you had to pay out of pocket, 3: the minute a hospital knows you're paying out of pocket they will drastically lower the amount you owe and generally help you find programs that will also help you out.

Point being we obviously aren't leading the world in healthcare equality but it also isn't nearly as 'hellscape' as some people think. Overall it is unlikely we'll ever be able to just 'convert' to a universal healthcare system, more likely what will work for the US going forward would just be a single payer system more similar to the UK.