In video game RPG's ALL you see is the result of the system. Also in CRPG, there is no-one there to guide you or call fowl or create gameplay because it doesn't need it. The system has eliminated the need for a GM.
And yes a game of pure system and setting with no GM like FFVII has legions of die hard fans.
Have you missed the part where I explained that I consider that the game itself, as written and designed by the design team has all the attributes of a decent GM? It has a good story arc, a fair bit of flexibility within certain limits, and is the arbiter of the rules. You are in fact interacting with a single vision... brought to you by many people, but a single vision at that.
Now, if you took the same idea, but instead you and all the other people playing were able to rewrite various areas of the game as they saw fit... and everyone playing had to abide by those changes, then you loose the dynamic. But CRPG's don't have that flexibility, and RPG's, with a single (or occasionally shared) GM don't normally allow that sort of wankery from a player at the table.
These other games, with no GM at all, however, are nothing but that. Player A says that people from his country can fly, player B pops in and claims they are all purple, and player C, high from one too many hits off the crack pipe suddenly declares that there are no women in the world, and everyone is a eunuch, but they reproduce by frottage...
Okay, worst case senario there. But the point is: When everyone is responsible for what is going on, no one is. Thus you have a completely different dynamic... one that makes for a completely different game. Not and RPG. Stop being mooches and come up with your own damn name for this type of game. Magic did it with the 'Collectable Card Game', rather than trying to be just 'card games' which confuses the poker playing crowd. Now its the GM-less gamers turn.