Cortana doesn't want game avatars to reflect the players. She just wants snug armour (don't we all?). By your logic, the game should be about pressing buttons on a controller instead of fighting aliens. Because that's what the kids playing the game are doing. Alternate response: Ah, but you see, my serious response to your cheeky joke was in fact itself a cheeky joke! And by replying seriously to my fake-serious joke reply to your joke reply, it is you who is Mr. Serious! Hah! Good day, sir!