Yes! Definitely don’t upload any pictures of your young daughter taking a bath or of your own body if you are a teenager. Those are evil and hurt people.
The issue was never that iCloud was scanned, it was that your phone is scanning your photos and that the list was opaque- it's a whole other thing if it's your own device which is supposed to be _yours_ that is spying on you. Potentially for big brother.
https://news.ycombinator.com/item?id=28676746