What I find fascinating is how smokers rationalize their behaviour, e. g. "weed is harmless". When they compare it to fentanyl or heroine/cocaine, but compounds are never intrinsically harmless. But you can not get that message across most folks who are smoking weed. It's a somewhat similar issue, to some extent, when you look at sumo wrestlers. These have a significantly lower life expectancy on average than the rest of the society in Japan, but the sumo association does not acknowledge that. It's really strange how the human mind operates.