What this essentially comes down to is a bunch of teams with high domain expertise and high technical capability was beaten by a team with higher comparative technical capability and lower comparative domain expertise. One has to wonder if one of the teams with higher domain expertise (ie work in the field every day) could achieve better results by improving their technical capabilities, or more aggressively applying their domain knowledge.
The question really comes down to whether DeepMind can beat any hard "game" (chess, go, protein folding etc) better than humans with deep domain expertise.