I would argue it should be handled exactly like drug addiction ought to be. That is, as a widespread medical issue. But it is more complex than drug abuse due to interaction with people expressly being part of the equation. One's phone is ever available and there are very very few places indoors or outdoors that it isn't considered socially acceptable to use their smartphone for social media. The same is not true for alcohol or cannabis. Most people won't simply walk down the street or hang in a park smoking or drinking. Phone addiction is far more visible.