Your photos are scanned as a mater of course for face detection etc, and has been for years. This method is far more suitable for the kind of all encompassing surveillance that you seem to be worried about. Did you have the same kind of uproar about that?
They scan before it leaves your phone. So it’s a lie. Nothing else matters at that point.
Apple can scan until their little hearts are content once it’s on their server. Not a moment before. Not until it is physically and entirely uploaded