Of course Yubel is right, she knows you better than anyone. I also figured that Judai already realized all of this when he was dueling with Asuka in the Pair Duel Tournament from earlier. Hmm, regardless, Yugi is the perfect opponent to help Judai regain his joy for dueling because not only is he Judai’s idol and the King of Games, he’s a kid himself, and also duels because it’s fun. His personality is kind and playful, just like a child.