It's about knowledge. The cliché is that people are just playing, but they're actually really testing and they have extensive and exhaustive test cases that they have to go through and follow, so it is very technical work.
I worked in aerospace before 1997, before games, and in testing QA there was a very professionalized approach in that you can get a technical degree in that kind of QA-ing. But you can't yet in our sector. As we saw with our game, Arkham Origins, suddenly we're testing a product that is much more complicated than before, that is online, that has integrated microtransactional aspects as Mr. Schmalz was alluding to. We're now seeing that it's much more complex, so the oversized thumbs just don't do it any more, we need people who actually have gone to school and have a very good analytical mind.