The US medical industry is effectively a government-protected AMA guild monopoly. Laws prevent people from getting basic medicines unless they have the permission slip from the right level of medical expert. Nurses are competent to provide the vast majority of medical care without any MD signatures required except by law.

Beyond that, the insurance industry is so distorted by political involvement for the better part of a century thanks to tax laws and regulatory capture among other things that it is absurd to declare it a consequence of free markets. It's a corporate cartel, plain and simple.