Good points, and yes liability is one of their big concerns.
I have another example of incredibly high US medical costs. I went to the barber this morning and he told me: his friend had developed a staph infection a few years ago. Really serious stuff, big complications. He had a good insurance plan, which covered 70% of all the bills.
The final bills came to around $3 million. He still had to pay $900 K himself ... negotiated down, likely, but in the end he had to sell his house.
That's what you get in American even when you have health insurance. Canadians should not aspire to the US health system.