That's the message from today's game.
His terrible mistake let Swansea into a game we were on course to win by a canter. And his needless sending-off ensured a nail-biting finale when we should still have won comfortably.
There's more to football than long-distance scorchers, Granit my boy.
Arsene seems to have a thing for reckless central midfielders. Song wasn't always measured in his aggression either. On the whole maybe not the worst thing as many opponents do try to take liberties with some of our lightweights.