It's not about being wrong or misinterpreting. Hakuryuu is NOT thinking. He is just going straight ahead. That is not conviction or confidence. Blindly doing whatever you want is neither of those. He does not think that his path is right. He isn't thinking at all. That is what makes his actions stupid. Did he look mature enough to understand his actions? If anything, he just looked like a child throwing a tantrum. Like Madaura said, he is still a boy.

He does make wrong happen though. If making anything happen is enough (which Alibaba actually did this episode, like saving his party and the pirate children from death), then I guess Hakuryuu makes the cut.