I smoke. Been doing it for about 35 years.
I understand why I do it now, and I am not thinking about quitting.
I am self-medicating, and I don't know of anything that does the same thing.
It's a quality of life issue.
(I don't believe that nicotine is my issue, so don't waste my time with gum or a patch.)
With so many other things wrong with my life, this is the least of my problems.
Smoking MIGHT kill you, EVENTUALLY. The downside is very much over-rated lately.
The crap the shrinks want to sell you is dangerous, has unacceptable side effects, is out of my price range, and the stuff I've tried doesn't do anything anyway.
When they find something that is less harmful than smoking, more effective and cheaper, I'll think about it. In the meantime, it makes me feel better.