One problem with taken naturally sourced plants or herbs measurement and the effect it will have on a person who uses them. In part, drugs of natural origin helps a lot but when it turns out that the drug/herb has been named an illegal substance, people have to steer clear from using it.
That's my tale though.
I agree that such substances could be helpful.
Nicely written, @manclar .
Also, many times a plant is demonized for political reasons, those are other issues, and I agree with you, because there are drugs like alcohol that are a thousand times worse than an illegal substance.