Relying on your teammates can be a drag in a multiplayer game, and League of Legends is no exception. Wouldn't it be great if you could just...handle everything in a match yourself?
It's a good idea in theory, but not so practical in execution for the average person. Not that that stops WQLFY from hilariously trying to play as two champions at the same time in this video! He doesn't do so bad, but your own mileage may vary, though.