My dad just had half of one lung removed. He’s a smoker. Not anymore. He smoked since he was about 11; he’s just about to turn 80. I think he gets why people say he should quit now. He’s doing OK. Best possible outcome for the worst possible situation.
He used to dance ballet: it’s probably what’s kept him going so long.
I stopped smoking quite some time ago, but I’m still hooked on nicotine – stinkin’ lozenges. Now to keep myself out of trouble (hands busy) I make these: