I have seen those studies and seen the results when I worked in a long-term psych facility. That place enabled smoking to avoid nicotine withdrawls and mood effects; they actually helped people who were cognitively able to say "I want a cigarette" but physically couldn't hold one to smoke by holding the cigarettes for those people. And I remember doing therapy during smoke break with a number of people because it was the only time of day they were cooperative and relaxed (they had I think 7 smoke breaks daily). And for me to do that would mean that it was a drastic difference because I really dislike the smell of the smoke (another reason my wanting to smoke is weird).

Later when I worked in home health I caught whopping cough which damaged my lungs. I had a patient with severe bipolar who was coming out of a really bad episode and I had to tell her she couldn't smoke with me present. I had to leave her house once because during our session she said she needed the bathroom and proceeded to smoke 2-3 cigarettes hoping I wouldn't know. Unfortunately the smoke escaped of course and I had to get out of there. I felt so guilty with her because I knew how badly she needed the nicotine, even though plenty of my co-workers didn't let people smoke in front of them even without asthma. It was one of many times my own illness made me very sensitive to others but I couldn't do anything about it (usually that was because I was keeping my privacy but sometimes it was about understanding certain things more deeply.) And then there were times I was less sensitive....those were bad....