I share your view that, almost certainly, items of great historic value will be dumped simply because the person sifting through the files will be out of tune with what should be kept.
The history of the RAE is always thin because of the reluctance of the authorities to allocate funds for recording it or because of so-called security considerations.
For heavens sake- if the authorities think some item isn't worth keeping surely no harm can be caused by letting someone else store it!