The backup apps I'm familiar with read files directly; they don't use asr.
If asr can be used to bypass FDA then that is just a security vulnerability.
If asr can be used to bypass FDA then that is just a security vulnerability.
That wasn't the the point, though. The point is that asr has special private Apple entitlements, allowing it to do things that other processes can't, but it requires root to run asr, so asr can't be triggered willy-nilly by any user process.