User blog comment:Pedro9basket/Battlefield 3 Reviews released/@comment-1840523-20111026172033/@comment-1142365-20111026173936

They do it not because it's easier, but because both the SP and MP are part of the same game. If the SP of a game is bad, it doesn't matter how good the MP is, the SP is still bad, and they will rightfully call the game out on that.