But most dope smokers will call BS and still think they have more brains, better skills and live to be a 150 by smoking any kind of weed.
For what it's worth, I smoked a LOT of grass in my college years. It was a life of getting stoned pretty much every day for about three years.
And after that I qualified for membership in Mensa. I joined it and then after a couple of years decided not to renew my membership.
I had a successful career as an accountant/analyst for around 30 years until I retired at age 51.
I turn 60 next year and I've only had a need to get healthcare once in the past fifteen years... a herniated disc needed treatment a couple of years ago.
Smoking dope in my younger years didn't contribute to my intelligence or good health but I don't see where it hurt those either. And as for the future, I expect that I'm more likely to suffer hits to my health from a 35 year, 2 1/2 pack a day cigarette addiction than I am from smoking dope for a few years.