Nearly 100% of Americans use toilet paper. That isn’t due to its addictive property. 23% of Americans use acetaminophen, each week. Nothing to do with addictive. 90% of anyone consuming anything isn’t automatically due to addiction. 

Caffeine causes mild physical dependencies which after an abrupt stop you may experience a day or two of symptoms, all relatively manageable.  

Compare that the nicotine withdrawal symptoms and the drive to consume more nicotine vs the drive to consume more caffeine and they are clearly completely different classes of drugs.