Excellent point. The messaging triggers for nudity in child accounts would imply that there is a separate, on-device scanning capability that has nothing to do with hash matching. Taken together with the backdoor for data exfiltration, and considering these come in the same announcement, there's no reason not to consider them part of the same spyware framework.

Just as "for now" it doesn't try to stop copyright infringement.

Seemingly every aspect of digital technology, from search engines to DNS providers, has been co-opted into the fight against piracy, so I wouldn't be surprised if the media industries started threatening Apple with "contributory infringement" suits if they don't re-purpose this technology for them.