I explained already sharing is part not all of iCloud Photos. Backups entered the discussion because you claimed iCloud meant backups not photos. And your word

I explained already sharing is part not all of iCloud Photos. Backups entered the discussion because you claimed iCloud meant backups not photos. And your words suggest iCloud Backup is more private than it is. Scanning device backups was not part of the photo scanning plan. But it is on the table always without E2EE. The article said backed up to Google Photos. And the photos were sent over Gmail and chat. It is not clear device backups were scanned or existed. And device content is a misleading name for backups in the context of scanning on devices.