I did a search for branches of alternative medicine and a list as long as my arm came back. And I have a long arm. Most of them have a cure rate no better than a placebo, but there are a lot of people that are willing to pay for them. This has been going on since the 1800's when snake oil salesmen sold elixirs and potions that claimed to cure anything from toothaches to bunions.
Let's take chiropractic for example. It's not approved by the AMA. The training course to become a chiropractor takes like six or eight weeks and then you're awarded your "degree". The wife goes to a chiropractor. I don't know his real name but I call him Dr. Charlatan which really pisses her off for some reason. The last time I took her for an appointment I told the "doctor" that I've been performing chiropractic on my knuckles every day for years. He said that was enough experience to be his assistant and offered me a job!