Ummm....wrong. Nicotine is a physically addicting chemical. Habituation is the secondary component that reinforces the addiction.
Most smokers won't be satisfied by simply ingesting nicotine to satisfy the addiction, because the act of smoking (or chewing) is a powerful reward mechanism in and of itself.
But the fact remains that nicotine (hence the use of tobacco products) is physically addicting.
Disclaimer: I quit in 2004 after 30 years of smoking.