By the time physicians get through college, medical school and residency, they have been well trained to not buck their superiors because it could cost them their career. Most of these folks have invested more than $100k in their education - often substantially more - and stepping out against their medical boards and supervisors is something they won't risk. I've seen doctors run out of the state by the medical board suspending their license - for nothing more than going against "standard practices", even when it made sense and healed patients.

There is a LOT wrong in our medical system; more than just changing a few rules will make happen.