Yeah, it sure is wonderful to repress a hated minority. How dare they befoul our pristine public spaces with their benighted culture and their foul customs‽
Of course, the victims of your repression might feel a bit differently than you do.
Cigarette's are addictive. They choose to smoke as much as an alcoholic chooses to drink or a heroin addict chooses to shoot up.
As such, smokers can avoid feeling repressed simply by quitting smoking, and they can save money and improve their health in the process.
What gives you the right to oppress people for the behavioural choices? What gives you the right to tell someone that his health is more important than his happiness?
I don't believe that you have that right.
Back when I played in bands, one of the aspects I hated about it was playing in the bars that allowed smoking. That very habit you are talking about caused my clothes and hair etc. to stink of tobacco smoke after the gig. Instruments would likewise smell like an ashtray and have to be aired out. I'm sure that wasn't good for my lungs, either.
I no longer play out, which means thankfully I can avoid any establishment that still allows smoking. I value my health and happiness too; second hand smoke isn't very healthy, and stuff that stinks of tobacco doesn't make me very happy.