Single Player Games Unnatural?

"The single-player game is a strange mutant monster which has only existed for 21 years and is about to go away because it is unnatural and abnormal."-Ralph Koster, chief creative officer of Sony Online Entertainment in a panel for the Churchill Club

It is in Sony's best interest to promote multiplayer games. The panel goes on to make the analogy of single player versus multiplayer as masturbation is to intercourse. I hope the creative at Sony comes to its senses and realizes that original gameplay is paramount, rather than downplaying a particular kind of experience.