I understand that the site might have decided to keep the permission in case of emergency. In this case, auditing is required.
I am not sure that I entirely understand the point you are trying to make.
As - by custom, tradition, and understanding, if not as an actual rule - moderators (who are volunteers) do not moderate threads in which they have posted as ordinary members, as other mods do so, by invitation or request - I fail to see the need for what you seem to have proposed.