Perhaps the desire to have an omnipotent god floating above and beyond us is the desire to have some being see and record the objective truth, untainted by human memory or the traps of ego or of believing that which you choose to believe rather than what is true.  An idea that somewhere there is an accounting for our mistakes and misdeeds, or silent moments of suffering or failure, the betrayals and disloyalty, the hidden opinions expressed in odd looks or coded phrases by someone or something untouched by our daily grind.