>Why not just kick off all the work you need to do?

Because I have an obligation to keep at least one tape drive free for
restores and/or ad hoc backups.

And also so I know when a set of processes have ended so that I can
start the next job in the daily processes stream, i.e. backup stg disks,
backup stg tapes, backup db, dr plan, eject tapes for offsite,
migration, expiration, followed by reclaims and move data.