I agree CSAM isn't likely to be pervasive in the photo libraries on iOS devices.
Android does not do on-device scanning, but Google does scan photos after they are uploaded to their cloud photo service. It's not on-device scanning, but the effect is functionally identical: photos that are being uploaded to the cloud are being scanned for CSAM. The only real distinction is who owns the CPU which computes the hash.
I doubt it's the FBI pressuring Apple. My suspicion is it's fear of the US Congress passing worse, even more privacy-invading laws under the guise of combating CSAM. If Apple's lobbyists can show that iPhones are already searching for CSAM, arguments for such laws get weaker.
Android does not do on-device scanning, but Google does scan photos after they are uploaded to their cloud photo service. It's not on-device scanning, but the effect is functionally identical: photos that are being uploaded to the cloud are being scanned for CSAM. The only real distinction is who owns the CPU which computes the hash.
I doubt it's the FBI pressuring Apple. My suspicion is it's fear of the US Congress passing worse, even more privacy-invading laws under the guise of combating CSAM. If Apple's lobbyists can show that iPhones are already searching for CSAM, arguments for such laws get weaker.