Is there an established procedure for fixing an entire profession? What's the solution if almost all doctors are wrong about a great many things? I suppose changing Med School to produce new more competent doctors could work, except then every new doctor has to work with old doctors as soon as they graduate that do things in a different and worse way.
Start a business that does it right. If you can get past the regulators and such, and there are enough rational customers, you'd do better than everyone else, and they'd start copying you.
A feature in Scientific American magazine casts some light on the troubled state of modern medicine.
Health Care Myth Busters: Is There a High Degree of Scientific Certainty in Modern Medicine?
Short excerpt:
Scientific American often gates its online articles after some time has passed, so I don't know how long it will be available.