I agree with your assessment of the medical system. But I think most doctors believe they're doing the right thing. Doctors are selected for training, indoctrinated using brainwashing-like methods, including sleep deprivation, then elevated, highly compensated, and surrounded by the like-minded. In my experience, many of them are true believers in the system they've invested so much in and think that people who challenge established medical advice and procedures are quacks and wackos.