Like many other beings on astral planes of all kinds, he was puzzled by the wizards. They were people with the family-sized self-confidence that seems to be able to get away with anything. They generated an unconscious field which said that of course they should be there, but no one was to worry or fuss around tidying up the place on their account and just get on with what they were doing. The more impressionable victims were left with the feeling that they had clipboards and were awarding marks.