i would argue that on a long enough timescale, anything will 100% kill you. not trying to be cheeky, more just trying to say that that sort of argument only really works for people who are active antismokers; most smokers (i think, from personal experience) are very aware of the danger of smoking, but feel that it offsets some condition of reality that makes it more tolerable even compared to the reduced lifetime. that's just my perspective though
Yes, you described addiction, which is a local optimum compared to being a little less addicted, because addiction traps your brain. Breaking addiction is better buy not adjacent.
