The problem is that the insurance is provided by private companies whose incentive is to earn as much money as possible, at cost of the people in need of medical care. In my country, I never heard of anyone going bancrupt over a hospital bill. It just isn't a thing.

Here's a fun story: my sister was living with an exchange student from the US. Some day the student was complaining about intense intestinal pain she's had for the past few days. My sister told her to go the hospital. The student asked her if she was crazy. My sister then had to explain her that hospitals are free and won't bancrupt her...