Take a look at bankruptcy due to health issues in Canada. It’s lower than the US, but still a problem. They have a single payer system, but what people tend to forget is if you’re really sick, you often can’t work, so even if health costs are minimal, you can still go bankrupt.

What I think would be helpful in the US is universal catastrophic insurance. Worst case scenario, you’re covered. If you want everyday health insurance, let people buy it or get covered if low income.

Many universal system use this type of coverage.