Earlier quoted context omitted.
Yet AI beat humans at every strategic game out there, from Chess and Go to StarCraft2. We don't have general AI, but in some fields, human understanding have already been outpaced.
Those three games are very far from "every strategic game out there", and even they can be trivially made much more difficult for AI's by growing their board size, for example, making more types of pieces with different moves, or making other changes to their rules. There are hundreds of chess variants alone, for instance.
This would also make the games more difficult for humans, and it would erase much of the accumulated knowledge about strategy.