I don't know about that card game you mentioned, but AOK is another kind of game, I don't think it's valid to use it as an exmple for Marcomage where.
AOK is similar to chess, where every move can be looked at and all possible moves can be calculated, in an extremely unrealistic case, 2 equally strong player (let's say you play against yourself in a world where you can be cloned), result will probably be a tie.
Or an easier example will be you running in a race against yourself.
However, in a game like poker, even if you play against yourself, the result will not be predictable due to the randomness (2 players can not have the exact same hand since there's only 1 of each card!). Sure everyone want to have Full House etc, but what if you don't? You bluff, you intimidate, you trick your opponents. Of course if your opponent gets Ace high flush every hand you have no chance to win.