Absolutely. And smart phones are also not literally a drug. Drugs, video games, alcohol, and religion, are all used as a part of coping mechanisms for many, however.
> a compulsive, chronic, physiological or psychological need for a habit-forming substance, behavior, or activity having harmful physical, psychological, or social effects and typically causing well-defined symptoms (such as anxiety, irritability, tremors, or nausea) upon withdrawal or abstinence
(Merriam-Webster, "addiction")
It might be stretching it somewhat, but I think video games, social media, and religion can manifest a habitual need to indulge, negative effects from doing so, and negative effects from not doing so. Perhaps not in most people.
Coping mechanisms/painkillers can naturally cause some people to be "in too deep" because they keep using it and become dependent.
