Earlier quoted context omitted.
When you disable ADP, your local encryption keys are uploaded to Apple's servers to be read by them. Apple could just lock you out of iCloud until you do this.
The hardware will not allow this, at least not without modifications. The encryption keys are not exportable from the Secure Enclave, not even to Apple's own servers.
Thanks for opening the enclave, don't mind if I ship these keys back home.
No notification needed, Apple has root access.