I believe addiction is as much about lifestyle as it is physical.
I stopped smoking cold turkey exactly 2 weeks ago. It has been surprisingly easy. Yes the first few days were a little tough but anytime I wanted to deal with the withdrawal I just reminded myself that cigarettes were causing the withdrawal and weren't the solution.
Part of why it is has been easy for me is I really do want to quit. I think most people trying to quit still want to smoke. I don't. I've been on an exercise program for nearly 3 years and the stopping is bringing me to a whole new fitness level. I have so many reasons not to smoke I know I never will again. It's strange, I don't even think about it. Certainly not like "oh I want to have one." I don't. It seems like I haven't smoked for years.
My point here though is smoking has been much easier to break than I ever expected. Perhaps it's sold to be tougher than it really is so people will buy the addiction breaking products and services.
I agree, I quit 21/2 years ago. I had a health issue at the time that spurred me on besides the fact that I was bothered with the money I was wasting on the habit & after spending 6 days in hospital I never gave smoking another thought. I think if a person gets gung ho about something and some bad habit is a deterrent that in itself is a big help to quitting. Me- I got gung ho about wanting to remain alive for awhile.