If any of that stuff worked on enough people, Pharma would be extracting the responsible chemicals and marketing them faster than you could blink. How do you think they come up with new drugs to begin with? One method is to see if any folk remedies have any real effect and if so, figure out why and profit off it if it works. If your stuff works on some people, fine, good for them. There is the possibility that research is often denied on those plants if they can produce a high that gets black market value, but lots of controlled substances are still used for medicine, so it’s a bit of a wobbly possibility. I’m not saying it doesn’t work AT ALL, mind you. Just not often enough to look profitable.