Flat out calling smoking "dumb" and "purposeless" has always bugged me a good bit. By no means is smoking great, but making blanket generalizations like that isn't cool especially when you start taking the science into account. The main reason people turn to smoking is for stress relief. Nicotine binds to nicotinic acetylcholine receptor in the brain, which causes an increase in dopamine release. Dopamine is a neurotransmitter that essentially causes you to feel good or relaxed. At this point nicotine sounds like a pretty dandy little chemical and people like that. The problem is the level of addiction it causes, which most people underestimate. Nicotine causes brief but very high dopamine spikes, so the effect doesn't actually last very long. Once the dopamine levels dip down into the low level your brain start begging for more causing that terrible addiction. Unless you are a smoker, it is impossible to really comprehend how powerful this addiction is and giving smokers shit for not being able to break that addiction is just low. So I suppose the point to smoking is to get those dopamine spikes, which then causes addiction. Of course there are other benefits to cigarettes such as weight loss, which plenty of people enjoy quite a bit. It's really that nasty addiction, coupled with the awful stuff tobacco companies stick in those things, that make cigarettes bad. Thankfully plenty of drug companies out there have been concocting drugs that help curb the addiction by messing with those dopamine spikes and they work pretty damn well, but I think I'm just derailing a bit a this point.