Oh for crying out loud... I am getting sick and tired of all this hype-mongering.
This whole argument relies on a very specific and inflexible definition of games, and either this guy's being disingenuous or isn't willing to admit that games can serve a purpose other than enjoyment in a social context. It's like saying that the only interesting part of Magic: The Gathering is that you play against other people - ignoring the collecting, deck-building, and strategic aspects which also go into the experience. It's like saying that chess has no value as an intellectual exercise, only in having something fun to do with your pal Bob over drinks.
Games with a focus on Single-Player move beyond what traditional, more simplified games have usually done and in addition to having gameplay, create story and characters and a finely tooled, immersive experience.
And let's face it, there are PLENTY of people who play games, and love single-player and hate multiplayer, because playing games with other people, for them, was a previously necessary evil which has since been done away with. Some people don't care for the social dimension, and some folks don't really mind one way or the other.
CAPTCHA: Which one does not belong. There is a list of options:
1. Emo Kid
... And that's the whole list, I kid you not.