I think some of that comes from this occurring in Oracle's cloud environment. It's not an on-prem setup where the customer has full control to manage/test back

I think some of that comes from this occurring in Oracle's cloud environment. It's not an on-prem setup where the customer has full control to manage/test backups, it's at least some level of managed service from Oracle. So at the least the commands used should have offered/enforced creation of a key backup as part of the encryption process (in the way that bitlocker does for Windows disk encryption) to reduce the risk of something like this happening.