It's an escape from reality. A big problem with it is people are mistaking the online for real life, and a lot of that is down to how addictive things on them become.
What's funny is when you concentrate on a single thing, without the distractions of a phone, TV or whatever, you'll find yourself taking much more pleasure in the task and a job well done. You'll lose track of time, in a good way, and be achieving tangible results rather than imaginary numbers on a server somewhere that don't actually matter.
I look forward to the polyarmoury weirdos sincerely arguing this position soon.