Quitting pot is easier than quitting caffeine. Heavy smokers sober up quite often for job drug tests, for example. I've personally smoked for years and just quit for a while. Some things get a little off because of habit changing: A few days of decreased appetite and a bit of insomnia. The hardest part is dealing with the boredom I get at first. I simply don't want to do some things, and then I also start seriously hating some other things I just did. Like cleaning house. I hate cleaning house, but simply just dislike it when I'm smoking regularly. I eat less healthy without the stuff as well because food enjoyment is different.
But really, quitting is just a bit of a bother even after doing it for years. If you mix it with tobacco, you might be getting tobacco withdrawals... which can be fixed with smoking (Not the healthiest thing, but I do it). It is a habit, not an addiction.
I've known a few folks that have issues quitting - each and every one of these folks I've known have had underlying mental health or physical health issues that were partially self-treated with smoking.
I'm not really advocating daily use, but I'm not against it either. I just don't want people thinking they'll be horribly addicted in the same manner as nicotine, alcohol, or even caffeine.