So is global warming....
Global warming is real. So is global cooling. Blaming it on humans, however, is the height of junk science. Your suggestion is in no way analogous to nicotine being highly addictive.
Smokers can absolutely be behaviorally addicted to smoking. The aroma of smoke can be addicting as well as the feeling of actually inhaling the smoke. I know lots of people who have to have a smoke after eating, when they drink, after sex and on and on.
Comparing nicotine addiction to food cravings means you're not being serious, and it is a serious issue. The word "addiction" is used very loosely today -- as when people claim they are "addicted" to exercise, chocolate, or the internet. Addiction is a medical term referring to compulsive, habitual use of a substance that has physiological effects but is not necessary for survival. Addictive substances produce tolerance (meaning that it takes an increasing amount of the substance to produce the desired effect) and physical dependence -- and unpleasant symptoms of withdrawal if use is discontinued. The nicotine in cigarettes fits all these criteria. Food does not.
If nicotine is as highly addictive as so many, including you now, claim it to be, why is it that so many people have no withdrawal effects for any forms of nicotine other than tobacco?
My reference to global warming had to do with the concept that it is "accepted science."
Smokers can absolutely be behaviorally addicted to smoking.
Thus proving that it is an habituation, not an addiction until the definition of the word was changed to include smoking - by the same people who decided homosexuality was not an abnormality.