Feature detection in images is extremely light weight so it seems that it would be fairly trivial to detect someones wang before the stream is encrypted in the first place. There is likely already a ton of processing done on raw camera data before it's encrypted and sent off-device anyway.

Who is to say it isnt on device but sending all the data on again? It being closed source is the issue. It existing is the issue.

Or, Apple is flat out lying and does get a copy of everything.

This is actually do to government policies being put in place in the U.K., Australia and such. In those countries if a user has a child account (under 13 years old) certain safety features are turned on by default now in those countries, and the parent can choose to turn them off. If your account is over 18 years old, has a credit card attached to it, or I think there is a couple other ways it will automatically assume you are over 18 and you don't have to prove it (otherwise you would have to scan your ID to get your Apple account to have you listed as an adult). In the U.S. you don't have to prove it, and it is opt in by the users.

So it's a catch 22, I think it should be opt in every where, but no one is winning a political campaign on saying 12 year olds should be able to send or receive nudes without their parents knowinh about it.