I don't think we have to worry about the medical "stealing" any of our knowledge. They're not interested in getting anyone well because they'd lose money. They would never use the whole plant, anyway, what they would do is take out what they could patent. They'd rather get rid of the oposition. So they're going their way, and we're going ours.
It makes me angry to see what books are being sold whenever a library has a book sale. Anybody can go and see what they are selling. They are always getting rid of books they don't want the public to read because they contain information that can be relied upon for health, no matter what small amount of information those books may contain at this point in time, which is hardly useful at all. They're slowly weeding out anything of any value and replacing it with garbage or something approved by the medical or FDA. Their efforts are almost complete.
It's true that whatever useful knowledge has been preserved has had to be protected.