This is FUD. Do you have any evidence that iOS allows any Apple server to get some kind of full control without asking permission and without using an exploit?

This is FUD. Do you have any evidence that iOS allows any Apple server to get some kind of full control without asking permission and without using an exploit? I suppose that if you are restoring from an iCloud backup and Apple has been convinced to allow the NSA to modify that backup, some kind of MDM stuff could be enabled, but this is limited and detectable. Otherwise, it may be possible, but you have not provided any evidence.