Israfil,
I understand what you're saying and I am aware of the distinction. The statistic suggests the same thing that its converse does. One can look at the issue both ways. In one sense, cold turkey is unsuccessful because the ABSOLUTE success rate is only about 10% (alcoholism, 20-25%). On the other hand, cold turkey could be viewed as successful since they occupy 90% market share of "successful" quit attempts. If most successful quits required outside assistance, surely that would suggest something else entirely. Although I fully see your point.
Another subpoint I was making earlier was that society, doctors, and family impose their wishes on smokers to quit so adamantly that it floods the market with 'flimsy' quit attempts, people just trying to make others happy. I theorize that people generally don't like being told what to do, especially smokers, since they continue to smoke even though everyone constantly tells them that they shouldn't.
On that note, I believe that many quit attempts are made when the smoker is not ready, either imposed by an external factor or their own guilt or what have you. Even if you think you're ready, you might not be ready. If I may look at it simply, (which perhaps I may not) if being a smoker for the next five years is in the cards for you, you will struggle with quitting pretty much no matter what. I believe it's not all physiological (brain/body).
If you are simply not ready to go to college, your college attempts will fail or flounder until such time that you are ready. When you are ready to do the work necessary to achieve your goals, you will succeed. From this perspective, the addiction aspect appears to be minimized. Quitting smoking can be hard, or perhaps very hard, or perhaps very very hard. But when you are willing to do what is necessary, you will succeed. It appears to be a simple idea.
The rebuttals to this idea might be, "it's not that easy, because quitting smoking is very very hard." To which I would say, "yeah, I just said that?" What are the other rebuttals? Why would these ideas not be logical?
I started smoking in January of 2005. My parents vocalized their concern only once in my five year bout with smoking. They were concerned about me becoming addicted, struggling with an unnecessary problem I could avoid through prevention. These were my words, half jokingly-
"Mom, in five years it's going to be 2010. It's going to be the future. By then, I'm sure there will be some future-science alternative to smoking that will be so awesome I won't even want to smoke anymore."
And lo, so it was.