As to the lucrativeness of the smoking cessation crapola, you are partially correct. The doctors don't see any of it, but the big Pharma companies do and one of the big funders of jacka$$es like Banzhaf and the rest of the anti-smoker cartel is the Robert Woods Johnson Foundation. The RWJF relies almost entirely upon its portfolio of Johnson & Johnson stock holdings (somewhere in the vicinity of 20 million shares). J&J makes smoking cessation products. Coincedence? I don't think so.
That's just like Algore pushing global warming theory to benefit his stock in a ground-floor company selling carbon credits! (I can't remember the name of the company).
As usual, follow the money.