I am not making, and do not explicitly agree with, the statement that only human brains are imbued with 'creativity'. However, the core of the alphaGo algorithm is just a monte-carlo tree search of the game initially populated with prior estimates of the value of each game state(with the generation of the prior value estimates being carried out by the DNN). I see no space in this simplistic statistical game analysis for concepts such as creativity. The move in question was chosen because it's prior value estimate by alphaGo was favorable and upon further analysis was concluded to be the most likely to result in a game victory relative to all other available moves. If alphaGo was only trained on human matches and subsequently was able to discover moves that drastically deviate from typical human strategies, I would be more open to labeling it as creative. However, most of alphaGo's training is carried out against itself, it's entirely possible that alphaGo has made this particular(or similar) move many times against itself during training.