You make an excellent point that is all too often ignored. At least in the United States where I'm from, most everyone is aware of the dangers of smoking by the time they move on from elementary school, but that doesn't keep us from beginning to romanticize it by the time we're in middle school (if not earlier). Hollywood and the like don't do us any favors, either. Whether we're really willing to admit it or not, smoking is portrayed as cool within pop culture.
Those of us who have smoked remember the relaxation it provides. Less often, we recall the nausea, the stench, the fear of those odd aches and pains, the frustration when we're forced to go without our habit, the financial costs, the missed moments, and more. In my own quit, I feel like I found a cheat code, because I quit overnight due to a collapsed lung. I tell my doctor, "The magic words to get me to quit smoking were 'spontaneous pulmonary pneumothorax.'" After that, I had very slight cravings, but they were so heavily outweighed by my newfound aversion to smoking, the cravings had no effect.
Even so, I'm thirteen months into quitting, and I still occasionally think, "I could smoke." I've been down that road before, though, and I know what happens if I let myself slip even once. I'll think, "Just this one," and before I know it I'll be back at a pack a day. That's why we say, "Not One Puff Ever." Even if the cravings are easily brushed aside at this point, I know I'm still an addict. That's not a moral judgment, but a practical assessment. There's no shame in needing to be especially careful about avoiding a substance that kills you by inches.
All too often, people treat cigarettes as some sort of light entertainment, despite the fact we all know it's dangerous. Those of us who recognize how truly dangerous nicotine is are treated as crazy or irritating for pointing it out, even if we are tactful in our approach. It can condition us to not take the threat seriously. Don't take the bait, friends. Remain steadfast in your resolution and your full awareness of the evil that lurks beneath the appeal of smoking.