yes that's exactly what it means...
I think it is very possible to win on picks without having the better picks. An example would be winning a game with a blind counter that could have easily gone wrong if your opponent is not where you predicted them to be.
so what picks are you envisioning that would have left him there?
Some of these might not be good options and there could be a few that I have missed:
1 S.America 2 SEA 3 CA 4 CR 5 E.Africa (6 S.Africa) - 50% chance of 1,4,5
1 SEA 2 S.America 3 CA 4 Ant (5 CR 6 WR) - 50% chance of 1,4,5 50% chance of 1,2,4
His own picks - 50% chance of 1,4,5
1 SEA 2 CR 3 S.America 4 CA 5 Ant (6 E.Africa) - 100% chance 1,2,4
1 Ant 2 S.America 3 SEA 4 CR (5 E.Africa 6 WR) - 100% chance 1,2,4
To be clear I don't disagree that gk is the better player, just that in this game him winning with a risky wasteland pick does not mean that he outpicked or outplayed Sophia.