What is the chance that Amazon cause an issue with your RDS backup, versus a Cloud Employee?
The answer is definitely not clear to me at all
EDIT: no sarcasm, I legitimately don't know which I would choose as a biz owner
I would personally always have an off-platform backup to fall back on, as protection against the platform going down, accidental damage to data or malicious damage to data. Snapshots in cold storage too.