Similarly that's also how addiction as a disease works. Clinical addictions generally imply more use than originally intended, some type of inability to quit,

Similarly that's also how addiction as a disease works. Clinical addictions generally imply more use than originally intended, some type of inability to quit, and some type of "significant impact" on school/work/relationships/goals. These are known risk factors for developing depression, and of course worsening it. More studies are good, but from a news perspective, "addiction increases depression severity" is hardly surprising regardless of what the addiction is.