Source? I am not aware of a law in the US that requires Apple to actively scan images, or to store them unencrypted (or keep copies of the keys).
https://www.govinfo.gov/app/details/USCODE-2011-title18/USCO...
Today this is less about physically tying management and physically putting wax in the crews ears and more about technically and legally making oneself unable to touch the juicy juicy customer data.