A Battle of Wits deck is different than what the Yu-Gi-Oh deck was trying to do.

Battle of Wits, while goofy, is a legitimate win condition and the player is trying to win the game by playing a card.

In contrast, the gigantic Yu-Gi-Oh deck isn't trying to win, but force a draw by taking up the round's time by constantly shuffling the deck. It would be like a Magic deck built around playing Shahrazad until an opponent quit or time was called. You aren't playing to win, but draw.