There's like 50 different GoTY games from a ton of different sources, which is why none of it actually means anything, especially when games from different genres are pitted against eachother.
There's just no logical way to claim that this FPS game over here is better than that RPG over there, or the racing game from the other direction.
There can be a GoTY candidate from each genre, but there will never be a single game to rule over them all. --- "Those who would give up essential liberty to purchase a little temporary safety deserve neither liberty nor safety." Ben Franklin