I agree with the article that it's not facebook. You're depressed, dont feel like doing anything but know you should, so you procrastinate on facebook, and then maybe the whole day passes, and the waste of another day makes it feel like nothing is going to change, helping feed your depression. Facebook really has little to do with this... if it wasnt facebook, it would be youtube, instagram, watching tv, or sleeping…
Facebook provides a temptation.
Like a table full of cookies over the holidays. Of course you are going to visit that table a hundred times a day. Even though it isn't really very healthy. And then when the holidays are over your diet will improve.
We are not Nietzschean creatures of pure will. The temptation-landscape significates.