If you let crazy people gives themselves titles like Doctor and open a shopfront, all legit and everything, then people will just take that kind of thing on face value.
Freedom doesn't mean the freedom to defraud and wipe out entire species.
A lot of people here are voting me down and saying that I'm totalitarian. I'm just advocating for banning some quacks from practising fake medicine. The opposite is allowing our planet's wildlife to be permanently, irrevocably wiped out in the name of old people getting erections or whatever.
Honestly, which is the more extreme position in your mind: Specicide or Regulation?