That may very well be because there is evidence that people undergoing such seizures may have been exposed to before they are born, and the chemical has affected their development such that they need the plant version to operate normally, instead of the human created version of canabanoids which the body normally uses.
I've seen some indication that pot usage around pregnant women adversely affects their children. Autism appears to be linked to heavy pot smoke exposure during pregnancy.
I know a woman who has an autistic son. I asked her if she was exposed to pot smoke while she was pregnant with him.
She said "Constantly." My husband was a big doper."
I got her to ask another woman in her Autism group about pre-natal exposure to weed. The woman responded in the affirmative.
Google cyclic vomiting syndrome. We are admitting more and more young people (and not so young people) to the hospital with this. No doubt it is caused by heavy mj use, but try convincing the stoners of that....
I see the harm every day. If folks think mj is a good thing, they are an idiot. There is a medical form called marinol, that is occasionally useful, but doesn’t get you high, so of course the stoners don’t like hearing that either.