Some people can quit easier than other.
Besides that, who are you to tell me that I should or must quit, especially if I don't do harm to anybody else than myself? What if I do want to use nicotine for life but I just don't want to experience all of the bad effects of smoking?
It's like as if I would say to "couch potato": do not sit! I can just say to him: "sitting is harmful and not healthy".
Say this to yourself, SCREAM it in your mind! "IT'S MY MONEY, MY HEALTH, MY LIFESPAN, and MY EXISTENCE!" These are things of immense value to me, and you have to PAY ME FOR IT if you want IT and your not getting IT cheap!
To me it's the existential harm done by the behavior. It's been dis prioritized for a reason. There are people who will listen to the anti-smoking ads, and there are people who will smoke anyways. The people who will smoke anyways are a specific subset that social culture entices to cause harm to themselves like a shadowy eugenics program. Tobacco companies kill more people than drug cartels and get away with it. You won't see a storm of special ops or whoever it was that got Pablo Escobar taking down Philip Morris in a hail of gunfire. Lawsuits abound against the tobacco giants and yet they're still doing business, no one is stopping them and there are only half assed excuses as to why. The tobacco farmer could just as easily be farming blueberries and be paid to retool his business from the illicit gains of big tobacco. Did you start smoking because it was a necessity to you, or did a social culture prey on an at risk individual. As humans we instinctively copy behavior. The whole culture of smoking needs to be overthrown. It isn't American, it isn't patriotic, it isn't anything but murder. Yet there are patriotic cigarettes, American cigarettes, and cigarettes that represent everything. It just represents death and you're part of it, walking the sad path of death and disease down a lonesome path with people who are so blinded by their rebellion that they keep walking the lonesome path to the slaughter house. Most people may or may not realize it, but they are supporting your habit when they tell you to quit, because the person who started smoking and never changed the behavior has a certain way of thinking about the behavior and they aren't going to quit because someone else tells them to. To me it looks like there are forces fighting over you as a consumer, and the ones that want you to quit are carrying a false flag. They just want some people to smoke and others not to because they're making a choice that excludes someone with your life experience. Both sides have marketing campaigns. I've come across some very well paying jobs offered by big tobacco where they are looking for people to enter personal social markets and stimulate others to smoke. Their job is to make smoking cool and make it look like smoking is a success trait. It's not, you just aren't watching a commercial so you don't know you've been advertised to, you don't know that they're trying to take your money, your health, your lifespan, and your existence.
Even your argument can't help you. It's been concocted out of fallacy by both sides, BIG TOBACCO wants you to smoke, and the Ad Council and whoever else designed it to work on someone else who they thought were of more value than you are. So it backfires. Their both your enemy, you just haven't seen it. If I took money from you everyday like a tax collector and enough blood to slowly make you weaker, day after day, would we be friends? Would you defend our relationship? Because you've probably met someone back in college or even in high school, probably a hot babe, who was working for BIG TOBACCO, getting paid $70-100K a year to help you develop a habit. They might not have even been your friend, just someone who was in your personal network, had another job on top of it and was only smoking to get you to feel it. They are more like spies than friends and they're fucking up your life, giving you a negative attitude towards what is right in life that spills over into every other part of your life like pollution, and you think that person cared for you. Even if you started smoking while you were underage, it's monkey see monkey do, and the person who got you started was repeating a behavior that originated with BIG TOBACCO's PERSONAL NETWORK MARKETING which is based on using the same tactics spies use to gain access to personal networks and influence people without anyone being the wiser. You are unfortunately just somebodies pawn. The same tactics are used by law enforcement to punish criminals and by teachers and school administrators to punish bad kids. You're role in life is like that of someone's enemy. Neither the spy, the cop, or the school administrators ever tell a person how they manipulated them. There is no debriefing for these things. Do you think BIG TOBACCO is ever going to debrief you? Kind of hard to do considering considering they would be interfering with cops, school councilors, and spies. So you're left fucked on the sidewalk just sitting there and no one can tell you. And you thought BIG TOBACCO cleaned up their act after all those lawsuits...
Sorry man. But you're already killing yourself, so the only way to bear the embarrassment is to quit and live indefinitely.