Comparing to smoking seems to be a huge stretch to me. One thing virtually guarantees cancer and an eventual unpleasant death while providing no measurable benefits at all, and the other allows you to easily travel all over the place cheaply with a relatively small chance of a major accident.
That's not true at all, the incidence rate of lung cancer in smokers is less than 20%. That's still much higher than for non-smokers (0.4% - 2%), but hardly a "virtual guarantee".
