[DanBC]

> The problem is that cannabis was never shown to be more harmful than tobacco scientifically in the first place,

Comparing anything to tobacco is weird because we spend considerable amounts of money trying to get people to stop smoking.

And we now have very good evidence that cannabis causes psychosis. That's pretty harmful.

[citrablue]

I just did a cursory review of some papers, and it seems like cannabis can induce psychosis. It looks like there's somewhere around 1.5-2.5x increased chance of psychosis diagnosis for cannabis consumers, although age and family history of schizophrenia matter.

From the NIH site on psychosis[0], about 3% of the US population in their lifetime[1]. About 100k adolescents annually have an episode.

For comparison, alcohol induced psychosis is common. Dependent alcoholics men face an 8x increase in risk; women see a 3x increase.[2]

[0] https://www.nimh.nih.gov/health/topics/schizophrenia/raise/r...

[1] worth noting that psychosis is not a "permanent" condition.

[2] https://en.wikipedia.org/wiki/Substance-induced_psychosis