My suspicion is that alcohol is mind-altering in ways smoking is not, and has a large effect on social interactions in business and romance and coping with the drudgery of daily life.
Take away smoking from the next generation and they move to caffeine or vapes. Take away alcohol and there are revolutions and religious extremist revivals.
Sounds like you're using the wrong fuel. If we'd switched all the petrol cars over to propane instead of having "scrappage schemes" to sell people new "cleaner greener diesels" - and you see how that worked out - then we'd have pristine fresh air in our cities now.
Second hand smoke is a large (almost overwhelming) factor in SIDS. Also for people who don't smoke, it smells f--king disgusting. Nobody wants to deal with that in their life.
Take away smoking from the next generation and they move to caffeine or vapes. Take away alcohol and there are revolutions and religious extremist revivals.