Yes, I smoked for many years, and quit many years ago. And you are correct, if someone smokes, that's their business between them and God. I don't even assume that they should quit.
I always liked what my little sister used to say. If she ever finds out she's terminal, a year to live, she said she's going to start smoking and get a tatoo.
I think it was Harry Blamires, Highway to Heaven, wrote something about the difference between the man who smokes for the sheer love of tobacco, compared to the man who smokes for the effect of the tobacco, IE, as a drug.
The one uses tobacco to reach an end, in the storyline, as an aid to study. The other uses tobacco for the pleasure of the tobacco itself.
I always enjoyed smoking cigarettes, pipes, cigars, but after a year of cough cough, I quit purely for health reasons.
Much love!