Comment by korse
I'll bite. The science, as far as I understand it, clearly demonstrates the addictive properties of nicotine and the negative health effects of smoking.
The alternative theory I've heard is that there are secondary benefits to moderate consumption of cigarettes (moderate in this case being three to five per day) due to appetite suppression and creation of a 3rd place accessible during working hours. Some would also suggest that, at least in institutional environments (hospitals, universities, corporate campuses and manufacturing facilities), the food court/cafeteria and the accompanying array of fast food have replaced the cigarette break.
In this view, we haven't really solved any problems. We've just shifted the damage into a form that society finds to be more palatable. What if we could bring back the cigarette break and in the process boost people's community engagement, mental health and significantly reduce the obesity epidemic all in one hrrrm...
Welcome to my favorite PubMed rabbit hole.
TL:DR; The way that most tobacco is produced causes it to contain Polonium-210. Can we at least agree that putting Polonium-210 into the human body is not great?
https://www.google.com/search?q=pubmed+tobacco+polonium