Why is Obs, the guy who started the whole thing through his blog, only a plebby user like the rest of us filthy casuals and not a god-tier administrator like he should be?

Because he first lived as a mortal man, before ascending to be the representative of the Beard on Earth.

Because his beard is an abstract concept and thus cannot be truly represented by mere rank and title. He is the metabeard, the voice of the one true growth.