It’s so easy. I can’t tell you how many “backed up” environments I’ve run into that simply cannot be restored. Often people set them up, but never test them, and assume the snaps are working.
Backups are typically only thought about when you need them, and by then it’s often too late. Real backups need testing and validation frequently, they need remote, off-site storage, with a process to restore that as well.
Been doing this shit for 30 years and people will never learn. I’d guess 9 out of 10 backup systems that I’ve run into were there to check a box on an audit, and never looked at otherwise.