It depends.
Of course, it's harmful and everything. But who gives a shit, look at the average life span. Are you serious? That's why you just do what you feel like. I've been smoking for a while, but mostly just IQOS and cigars. But I'm thinking about getting back to cigarettes because I simply love the process. I really like going to a coffee shop or restaurant, sitting outside, smoking a cigarette and sipping some. I also love smoking when having important conversations or just when observing things when I'm outside.
Basically, I find smoking as another type of accessory for men. As I already mentioned - I completely understand that it's bad and addictive, but whatever. If you're smoking, because you are simply addicted and hate smoking, you should definitely quit. If you're smoking because you simply love the feeling when you pull out your zippo, pop it open and light up a cigarette and at the end of the day - love the process itself, just keep on smoking and fuck what people are saying. If you want to smoke - smoke. Most of these healthy ass vegans gonna' day sooner than you anyway.