There is a difference between a 'second-grade' hobby and an actual hobby. A hobby that you have a passion for you do regularly, perhaps even everyday, whatever it might be. A 'second-grade' hobby, under which a lot people here file roleplaying, is something that you only like the idea of and are willing to give up, forever, at any given moment. Some people do set unrealistic rules and expectations, but from what I've gathered it's only to weed out the second-grade hobbyists/escapists and make room for people who actually have roleplaying as a legit hobby.