Because their game is great and for someone to disagree is just crazy, this game is perfect why would someone give lower than that score? That person is clearly a idiot who needs to be told to his face he's a jackass and maybe a fanboy, and idiot jackass fanboy.
Honestly? I have no real clue because I've got a few games that I saw get fairly low scores that I had FAR more fun than the 9's and 10's reviewd games. Saints Row 1 and 2 vs GTAIV comes to mind, Saints Row CRUSHED GTA in my mind in every way and was simply just more fun in general. Does that make GTA bad? No I just didn't enjoy it as much. Did I care about the scores? No. I cared that I had more fun and know that review scores are worthless, it's better to see for yourself.