Yeah, it's a great quote, but when you stop and think about it, the game industry follows that model for the exact same reason the movie industry does: because crap is cheap to make, and a certain percentage of the crap is going to sell enough to make up for the losses from the rest.
Moreover, every once in awhile you get a Smokey and the Bandit that comes out of nowhere and gives you a gazillion percent return on your investment...