Essentially 0% of professional photography or videography uses "straight out of the camera" (SOOC) JPEGs or video. It's always raw photos or "log" video, then edited to look like what the photographer actually saw. The signal would be so noisy as to be useless.
But we are talking about consumer devices here.
Are you saying Apple and Google can't put a secure hash into the output from their camera apps that apply after their internal processing is done?