Right, there is some tension between the number of moves and speed. Having only 20 moves to solve the cube sounds like a great idea except that the calculations to find out these 20 moves take too long.
Speed cubists win despite having to make more moves because calculating these moves can be done very efficiently (and almost instantaneously) by our brains.
Speed cubists win despite having to make more moves because calculating these moves can be done very efficiently (and almost instantaneously) by our brains.