"Only thing that makes a good game is, Is it fun? It seems to have that for millions of people."
How silly. What other artform can be judged entirely on how "fun" it is?
This is, I think, the fundamental difference between the games as art crowd and the Blue Ocean strategy: the latter rejects the very notion that there could be anything more meaningful than sales in determining the worth of a game. If a music critic showed up who praised artists based exclusively on how many records they sold he would be laughed out of town. The same for a literary critic who declared whatever happened to be at the top of the bestseller list the best book in the country, or a film critic who declared that Avatar had taken Titanic's crown as the best film in all of history the moment it grossed more at the box office.
A game's worth is not traceable to how many copies it sells, nor can it be discerned from how accessible or enjoyable it is to most people.