The problem isn't that he's playing video games for a living.
The problem is he doesn't give a shit enough to put out a product that isn't complete garbage. Game Grumps is fucking trash. The hosts are trash, the jokes are trash, the editing is trash, the gameplay is trash, it's all terrible and they make no effort to improve. In fact, they actively REFUSE to make any effort to improve.
Not to mention, Arin is insanely ungrateful for where he's at. He treats fans like shit, refuses to listen to criticism, and he's constantly complaining ON AIR about how hard his job is. Nobody gives a shit how hard your cushy life getting six figures a fucking year for making dick jokes while mashing buttons, you faggot.
The LP bubble has got to burst eventually, and Arin frequently pisses his money away. After Game Grumps, what's left? What is he going to do next after nobody wants to watch him shout at Sonic games anymore?