I’m a former smoker, started at eighteen years while in the Navy, smoked for eleven years and got to the point it was three packs a day and sometimes a few more. I finally quit at 29 years and now I can’t stand the smell of a cigarette but I have never known of anyone who was so sensitive that a whiff of smoke endangered his life.
I have asthma and have nearly died twice from attacks and second hand smoke especially in an open setting does not scare me in the least. It does bother me in an enclosed area but then I am free to avoid it.
BTW I am ardent supporter of people and business deciding for themselves how to handle smoking.