If we go by data, the US healthcare system is the most expensive (not arguable) and is not even in the top 5 among developed countries in the most important measures. These kind of experiments are welcome (if they come to pass). People deserve better for what they pay currently.

one of these references is from an US insurance company who you would think would be biased for US healthcare

https://www.cignaglobal.com/blog/healthcare/top-10-countries...

https://www.washingtonpost.com/world/2021/08/05/global-healt...

https://www.internationalinsurance.com/health/systems/