Indeed, I think what made the bans possible was declines in smoking rates. And those declines were partially driven by increasing tax. Look at California for an example:
https://www.cdtfa.ca.gov/DataPortal/charts.htm?url=CigTaxSur...
Note the big jumps in cigarette tax revenue in 1967 and 1988. That 1988 jump is from Prop 99: https://en.wikipedia.org/wiki/1988_California_Proposition_99
Then look at the bottom graph here, showing how CA smoking rates declined quickly from 1988 to 1995 when the indoor ban was put into place:
https://tobaccofreeca.com/tobacco-industry/2016-california-t...
Of course, a lot was going on there, including social changes and the use of a lot of that revenue to discourage smoking. But it would seem pretty bizarre to me that the lack of smoking in public places had nothing to do with it becoming significantly more expensive over time. Especially given what a sizable portion of the retail cost of cigarettes was taxes: https://www.tobaccofreekids.org/assets/factsheets/0210.pdf
My argument wasn’t that people quit smoking all together, but people stopped smoking in public spaces like planes and bars. Sure the occasional person lights up in the airplane bathroom despite the ban, but I think my broader point still stands.