You do not have to consume a lethal dose in order to have symptoms of toxicity. And yes, I would consider ginseng to be a toxin. I used to drink ginseng tea myself, before I looked it up and read about its biochemical properties. I haven't touched it since.
As can non-toxic substances. Water for example. Your logic seems a bit weak with this statement Mom. Substances that can have toxic effects at one concentration can have beneficial effects at another and can have mixed effects at others. As with many things in life, there is the matter of balance to take into consideration. Do you consider all cannabinoids to be without beneficial effects when introduced into the body?
I guess you missed the sentence where I stated that I studied toxicology for my PhD. Thus, the toxicological saying that the dose makes the poison runs in my blood (in a purely figurative sense, of course).
As for alleged beneficial effects of any cannabinoid, I have yet to see any medical documentation of that. I've only been searching the medical literature for it since the 1990s. One of my research staff has an active cannabidiol research project right now, so I know from personal experience that researchers are still looking for those medical benefits.
BTW, have you figured out the full carbon cycle yet? Do you want me to pop back into that thread and explain about CO2 to you again?