This is dependence, not addiction. These are two different things -- you can be addicted to a drug while not dependent, and you can be dependent on a drug but not addicted.
It doesn't matter what the drug is nor how safe or common its use is. You can be addicted to nicotine, and you can be addicted to caffeine.
The issue here is the extreme negative connotation of the words "addiction" and (especially) "addict". When you think of an "addict", most people see the junkie with track marks all over their arms or the tweaker who hasn't slept for
three days straight.