Also, some docs/nurses are too fucking stupid and arrogant to look outside of protocol (associations, et al.).

They have been conditioned over time to know that if they go up against the system they will be controlled and punished by that same system. They are told "comply or be banished" and nobody wants to be fired in an industry that is controlled and policed by the pharmaceutical cartel. They have spent years and tens of thousands of dollars on their education and it would take an exceptionally strong individual to buck that system with their family finances on the line.