Don't disincentivize what?

For example, taxes on cigarettes do in fact discourage smoking. "Most studies found that raising cigarette prices through increased taxes is a highly effective measure for reducing smoking among youth, young adults, and persons of low socioeconomic status." You're equating different kinds of incentives. Or I guess the NIH is just conservative propaganda.

By your logic non-smokers are just "cheap" and should probably pay that money too since that all smoker tax money is subsidizing health programs that might just benefit them or society.