Bobish, while there are biases at play, I don’t think you’ve characterized them quite right. In general the doctors will suggest things that are supported by proper research, and that’s a reasonable and ethical stance. Unfortunately the bulk of the research is indeed conducted by pharmaceutical companies, and is only conducted to test high-profit medications. So “free naturopathic remedies” rarely include much reliable information about applicability, efficacy, and safety. Folklore is sometimes correct and sometimes nonsense, and it can be very hard to tell which you’re dealing with.
Most natural remedies are pretty safe, but some of them are not. Doctors have no financial bias behind telling people to avoid things like hydrogen peroxide or colloidal silver. Instead they have data suggesting that these things are a poor idea. I don’t doubt that some folks will get away with these at some doses, but that’s a far cry from “safe.”