She is so well-regarded that even she likely never imagined this could ever occur. And even if she did, it is impossible to imagine she could clear her entire work PC every single day and keep all of her files on her person at all times.
I find your argument specious. Give the capacity of portable storage media, not to mention multiple cloud options, it is not difficult to perform incremental backups daily. Given the importance and potential impacts of this information, it would be negligent to not have the files independently backed up.