The additives in cigarettes are a real problem, cigarette addiction is a very bad thing, and the health risks are both serious and obvious.
That being said, tobacco smoking is an ancient ritual that is very enjoyable. If you don’t smoke excessively, you brush your teeth, and you wash your clothes, it is not disgusting.
Cigarettes are bad for you, and if you smoke continuously they will kill you. There are really no health benefits (besides some studies that show that they make you more alert), only consequences. Lung disease, heart problems, throat and mouth cancer, and so on.
I often consider smoking and overeating similar. Both have obvious health risks if done constantly, but when they are done only occasionally are not very harmful.
The two biggest problems with cigarettes are the additives (which simply shouldn’t be included and are very bad for you), and the effect on non-smokers. Second hand smoke is a real issue, and it blurs the argument that smoking is a personal choice.
Its a complicated issue.