It's not about lack of knowledge, it's greed. For doctors with flexible morals, garbage medicine is a shortcut to wealth.
Since non evidence based treatments aren't covered by health insurance, these practices are cash only. And cash only = $$$ because the doctor is getting the full payment and not just a fraction of it.
Dr. Oz is a good example. He was a CT surgeon at Columbia, which is considered the mecca for American CT surgery. But even if you are at the very top of your field as a doctor, there will be a cap on wealth, and you will never find fame. Oz gave up surgery, started hawking essential oils and is now very likely the only CT surgeon in the country with a net worth in the 9 figures.
Since non evidence based treatments aren't covered by health insurance, these practices are cash only. And cash only = $$$ because the doctor is getting the full payment and not just a fraction of it.
Dr. Oz is a good example. He was a CT surgeon at Columbia, which is considered the mecca for American CT surgery. But even if you are at the very top of your field as a doctor, there will be a cap on wealth, and you will never find fame. Oz gave up surgery, started hawking essential oils and is now very likely the only CT surgeon in the country with a net worth in the 9 figures.