Maybe they would if they had apps?
Seriously, I agree. "All natural," "herbal" medications
(of which dagga is one, don't forget) can do serious harm. And chiropractors can seriously damage your spine if you're not careful. But let's not stop there: so called "lay councilors" give psychological advice all the time, and I wouldn't be surprised if more than one have driven people to harm themselves or others.
So hey, let's all agree that human beings have no idea how to take care of themselves and to make informed choices as to what they do or don't do with their lives. Regulate, regulate, regulate! The state knows best, after all!