They are not. With 50-70% income tax on It's citizens, they are not just fine. Do your research. Long waits, little access to specialised docs. People are dying waiting in line.
I come from such a country and your complaints are hyperbolic. I was in hospital a lot of a child and if we didn't have public healthcare it would probably have bankrupted my family. Public health systems are far from perfect, but they're still pretty damn good.