I disagree with your premise. While it's true that in theory, we could run minimax on a sufficiently powerful computer to solve chess and go, we can't in reality solve chess and go with computers. And even if we could solve them with powerful computers, human brains still cannot.
You still have less than perfect information about the decision tree, and you have to pick what you think is the best move from all of the available moves. In that respect, games of perfect information are no different than games of imperfect information when the scale of the game is too large to be solved.
You still have less than perfect information about the decision tree, and you have to pick what you think is the best move from all of the available moves. In that respect, games of perfect information are no different than games of imperfect information when the scale of the game is too large to be solved.