How many Americans do you think smoke? (Genuine question, I've never been to the States but did live in South America, and was absolutely shocked by how almost nobody smokes there.)
https://hsph.harvard.edu/news/u-s-smoking-rate-hits-an-all-t...
The article suggests that 18%+ are using some kind of nicotine product in general (zyn, chewing tobacco, vape, smoking)
In any case it has been mostly successfully purged from public spaces.