Don’t Blame the Dice!
Most games have some element of luck to them. Random elements make the game somewhat unpredictable. It forces the players to be adaptable in the event of unforeseen circumstances. One of the most common of these elements is dice. Rolling a pair of dice does not produce a completely irregular pattern; a seven has exactly one chance in six of coming up, while a two or a twelve each have one chance in 36. Considerably worse, obviously.