you have a decent point but i dont think that work can be compared to "gaming" 10 h /*day , work or starve
on the other hand i see "philosophical thinking" much more productive than cliking the screen . the brain is a muscle, at least analizing ideas makes you move the muscle.
if my theorical son spend the day thinking maybe i would be worried of what will be of his life but at least he is making his brain move and with a lot of luck he can be a future writer , philosofer . he is gaining something of it.
what would anyone gain with Wow or almost any game by abusing of it???