Ya know, I really can't relate, since I don't chew or smoke, and never have, but my old man chewed/chews, and I'd venture that 90% of my friends do.
In my experience, outside looking in, frankly, it really flat sucks that guys can't just drop it. I think it's 1) unfortunate that so many guys DO want to quit, but can't, and 2) admirable that so many guys do quit, or at least TRY to quit, even as hard as it might be.
A lot of my friends and family have been through quitting, starting again, quitting again, etc etc, and while I don't know first hand how hard it is, I do know "second hand" how difficult it is.
Here's my most recent experience with someone quitting, it was a really silly suggestion at first, but it's working for my buddy so far, and I'm happy to help him:
One of my good friends and co-workers started trying to quit smoking when they found out his wife was pregnant with their second child. McKenna is 3 this month... He's been off and on a few different times, might go 3mos or more at a time without a cigarette, I've been his "support buddy" for the last 6mos, and he's been doing really well this time around. Our deal is that if he needs a cigarette, he has to call me to ask for permission first, if he can convince me that he "deserves one", then I agreed that I would tell him he can... Ultimately, the exercise forces him to think about why he "needs" a cigarette. He calls, says "man, I'm dying for a cigarette," and I ask him, "well, why do you need one?" He never has a good answer, and ultimately, he decides for himself that he doesn't need one. He DID use E-cigs and then nicorette gum to get off of the nicotine slowly. The first few months, he'd call and say he needed a cigarette, I'd tell him his reason wasn't good enough, but if he was stressed, he could hit an E-cig or gum. Then he eventually had to call and ask if he could use the E-cig or gum too, and then it came down to he just doesn't need it anymore. He still calls, but it's less often.
There was only ONE day where I did tell him he could justify a cigarette, which was a long story, he was on a search party for a guy that lived up the street from him, his mom had found a note saying he was walking into the woods to kill himself, and my buddy was the one that found him. I figured he didn't need to deal with "needing" a cigarette and process that all at the same time.
Hang tough brothers. It's a heavy burden to carry to "kick the nic", but if a person WANTS to quit, then don't let anything stop you from getting what you need to get off it.