DY is actually right about the science. Pot has more carcinogenic content than tobacco; the real question is why do so many people believe it’s the other way around?
For starters, people who smoke tobacco often smoke 20 cigarettes. Nobody is smoking 20 reefers a day. Pot smokers who do end up with lung cancer have always been people who also smoked tobacco, so there’s never been a case of someone getting lung cancer purely from pot (to my knowledge). That is the basis of the “pot doesn’t cause cancer” myth. Breathing in campfire smoke, coal smoke, paper burning smoke, etc. is bad for your lungs. The idea that there’s this one magical plant that breaks that rule is laughable.
I think there’s a real halachic debate to be had, especially about whether or not it would be theoretically mutar on Purim, but clearly that’s not the direction this thread went. The pro-pot posters have made their agenda very clear.