> It's not enjoyable.
People wouldn't get addicted if it wasn't enjoyable. People's first experience with smoking cigarettes might not be enjoyable because cigarettes taste, smell, and feel awful, but the nicotine inside them is so incredibly enjoyable that it gets people to ignore the awfulness of everything else.
I've quit now, but I've used nicotine for years. In the first few months it gave me a rush, it made me more alert, energetic, and provided a distinct boost in concentration.
Some (but not all) of those positive effects wore off after a couple of years but I always felt like I was getting something in return. It's been a year since I quit and while withdrawal symptoms (awful, by the way, I definitely don't recommend starting!) have gone away and I don't get any cravings anymore, I still notice a slightly reduced level of functioning in myself. It's slightly harder to get started on things, stay focused, and get them done.
Denying this reality by pretending that nicotine is just universally bad and doesn't provide any form of pleasure is how you get teenagers to ignore everything else you said when they try it and find out that it does all of those things.