Last time I checked policy stated (*) that only closing highly disputed AfDs was "an admin power", though those are the only ones that take a significant amount of time anyway. This was a step up in power from the rules during the early days, when the rules specifically said that non-admins were allowed to close VfDs.
(*) I can't find the policy at the moment, though.
Well yes, uncontroversial keeps can be closed by anyone. My point still stands, though.