If someone tells you to do something and you don't want to do it, you can refuse. There may be good or bad consequences for your choice.
Nicotine is what keeps us coming back for more nicotine but what about when you no longer use nicotine? What makes people go back to smoking then?
Their thoughts take them back to smoking. Memories of the comfort from the dopamine triggered by the nicotine from a similar experience as a smoker? We have routines as smokers that take effort to change but, they can be changed.