"Unfortunately, even today, test restores are sadly very uncommon"
It's even worse than that.
When pointing out that, with the proposed backup process, restoration was not even possible†, I could hear the Bell, Book and Candle‡ being grasped in the face of my apparently gross heresy.
The idea of working backwards from the objective is apparently so alien that it appears that the disciplines of Operations Research have largely been forgotten.
I had mistakenly believed that clearly identifying what would need to be restored in the light of various contingencies should guide the processes by which the restoration might be made and those processes in turn ultimately guide the design of the backup process itself.
As for trying to communicate the difference between an archive and a backup - clearly a bridge too far.
I am certain a great deal of so called shadow IT is purely created as an act of self preservation to remedy just such management myopic shortcomings.
(The job you save might be your own but it's also miserably true that messengers suffer an unaccountably large number of gun fatalities even outside the US.)
Even now for me the go to guy is W. Curtis Preston whose "Unix Backup and Recovery" and "Backup and Recovery" are still on my bookshelf augmented by "Modern Data Protection."
† "There's a hole in my bucket, dear Liza"
‡ the anathema is rather theatrical but I am fond of Kim Novak/Jimmy Stewart movie which inspired Bewitched as The Brass Bottle, I Dream of Jeannie