[fireman15]

Drug companies are not in the business of manufacturing plant extracts.

Drug companies have and are still studying therapeutic uses for marijuana and various other drugs that are based on plant extracts.

[phs3]

But they dont sell plant extracts. They chemicalize, isomerize, and twist into something else, usually a more dangerous version of itself.

Another interesting fact: Humans and other mammals have receptors in their brain that will only attach to THC. That means that those who have had contact with THC use parts of their brains that a THC naive individual will never use.