The US has world leading facilities, doctors and research, but that world-class capability is only really accessible for the top 5%-10% of society.
The next 20% of folks get something that's roughly equivalent, if a little better, to what folks in say Canada, the UK, or other countries with public healthcare get.
The problem is, the bottom 70% of society gets worse care, for more money, and suffers from substantially worse health outcomes, while living under the constant risk of crippling debt or personal bankruptcy due to medical issues.
Personally I'd much rather a system that takes decent care of everyone than a system that takes really good care of the rich whilst everyone else suffers.