Does the ideal man reject art?

I don't think I said anything like that. The "childish things" refers to passive consumption and being reactive to world around you, rather than being active and creating and choosing your path despite setbacks and obstacles.

Intent matters. There is a difference between "ingesting" and "consuming". In my example I can play a game for a couple of hours and learn ALMOST everything I'm going to get out it from a game design perspective. But if I keep playing after that (and the next day, and the next day) I'm just wasting time because that is easier than getting to all of the stupid "real life" stuff I have to deal with.