[snip]
As I’ve said in related threads, I’m fine with Apple scanning whatever we upload to their cloud. Just don’t perform ANY portion of the scanning/verification process on my device.
You shouldn't even be fine with that. Suppose you're a journalist uploading sensitive information to Apple's allegedly secure iCloud. You absolutely wouldn't want anyone or anything snooping on that data. Unless you're in China, of course, where there really isn't such a thing as privacy.