Actually, Tarquin is wrong. He has more than moderator powers. He is an admin, which means that if he wanted he could delete the entire board, delete all the members, or even demote us both to ordinary members.
However, the real reason is that there is work involved. I need the three of us every week or month or so to download the database in text format so that if the board does foul up, we have a backup.
ADMIN > FORUM MAINTENANCE > BACKUP DATABASE > DOWNLOAD
Make sure you click "Save the table structure." And then keep the file safe.