Zen, Raifudo, yourself... All three of you belong to the same general RP group. All of you follow the same set of rules, regardless of whether they are followed by every active member of SL (it's getting that way since everyone is either heading off the radar or leaving the site). You're biased in the sense that you follow the rules established by a certain group about how to fight.
For example, some would argue that hiding is a move. Others would argue against it. Still others would say it's rather conditional. Or, some say biju challenges are outright ludicrious because they defy the logic of the series, while others have absolutely no issue with them.
Even still, while you all can say you're unbiased, do things that seem to support that and all, there is still never any telling on whether or not you, anyone, or me are not slightly biased without realizing it.
Summary: SL is still fairly large, and not everyone RP's as the most obvious canindates do. What is called legit in one language is a nonsense in another. If biju fights are explicitly for just those who want to follow the biju rules, then it's more narrowed, but at the same time, that means an entire set of the playerbase is left out in the cold. Judges with their own rules on the issue will only aide that cause with perceived bias which, in a RP environment, is grounds for not having them be a judge.