Our ignorance of things technical, computer-wise, is part of the problem.
"Servers" are just sets of hard drives, physically and electronically connected and "stacked" as an array.
The only exception are tape backups, still a most efficient and reliable form of backups, but nevertheless also vulnerable to funny business by dedicated criminals.
Yes, but a secure server means that the server has a mirrored hard drive AND a tape backup, so no single hardware failure or facility being destroyed (it happens) will result in the loss of critical data. Isn’t that the way data is protected?
In reply to your question, data can be protected so that it is never lost from anything short of EMP, If it is wanted to be preserved.