You're not wrong about smoke always being bad--there's a reason American Spirits have to have a disclaimer about "additive-free" not meaning healthier. Tobacco takes up alpha emitters from the soil and leaves them in your body--never good.

Pipe and cigar smokers are much less likely to smoke a pack's worth of tobacco a day. You also don't inhale them into your lungs, you hold the smoke in your mouth.

Smoking cigarettes is less about getting nicotine and more about having something to do when you are stressed etc.

Well, I suppose less radiation could be one of the advantages of a crack habit

Fun fact: the stress that smoking cigarettes relieves is only the stress caused by the addiction/relapse from nicotine. Surely, there might be some placebo effects going on, but nicotine is not a stress relieving chemical.

So really it is just about getting nicotine, but over time the ritual around the addiction adds to the addiction.