It's not a backup if it's never tested.
I knooow.
It's an almighty PITA to do a full restore, endless trouble, planning, review, blah blah.
So much easier to hope it's all right and hope you never need it.
But, y'know, fail to plan or plan to fail.
Because when the s**t hits the fan PHB's love to point fingers and end careers. It makes them feel better. It's not fair, but it is what they do.