My small experiments with cannabis have made me wonder how tobacco possibly could have ever become more popular, the former's effects are much more noticeable with a vastly smaller amount of smoke and can be quite pleasant.
There are definite short term advantages to smokers. There (_)used to be similar short term advantages for those who drank during work hours when it was socially acceptable.
(_ Used to might be wrong.. Startups with designated drinking times that seem to be mandatory are annoying but not irrational given their short term interests.)
https://www.gwern.net/Nicotine#benefits
Tobacco also naturally contains, in addition to the nicotine, other compounds that act like MAOIs - ie, as antidepressants: