I think this ties into the idea of MMORPGs. I used to play them a lot until I realized they were not fun, just addictive; they make you feel like you're accomplishing something by leveling and gaining skills, when really it's only your character that's improving - you're not getting better at anything.
Paul contrasts two situations, the first exemplified by the "watching TV all day" example, the second by "staying all day at the office doing busywork while not accomplishing much". Playing MMORPGs all day seems rather like the first, not the second.
The grinding kil-15-wolfs type of missions often had me going: "ok, only 3 left.. phew"