Are you off your meds again?
Let me copypasta the original post, since you seem to have forgotten what the thread was about:
Scenario 1:
Several backup drives. One dies, in a RAID array, array is rebuilt and data is safe.
Scenario 2:
Several backup drives, non-RAIDed. One drive dies, all data on that drive is gone.
It's pretty simple, I'm not sure why you're having such a hard time understanding it. Nobody ever said that RAID'ing your backup drives will be the equivalent of storing your data on the cloud, or sending your data on a USB stick via carrier pigeon to a secret mountain hideout. What it will do is ensure that if a disk fails, in your backup system, that you can recover it. That's it, nothing more, nothing less.