Google could add a feature to their OS to upload all pictures to their servers, but that'd likely violate laws and is easy to detect (unusual network traffic).
Thus it is extremely unlikely they upload your pictures to their servers if you disabled their cloud backup feature.
What's more likely is that they hash your pictures locally, and upload the hash to their servers, like some government proposals want to make them do (to find known CSAM, they say). Or they could track metadata of the pictures (location, date/time). This would be hard to detect and some of the info they likely already have through other features in the OS. Whether they do those things or not I don't know.
This data wouldn't reveal the content of the pictures, so nobody can see your images.
Einige Teller werden fast voll oder zur Hälfte gefüllt abgegeben, wenn es jmd. nicht schmeckt oder jmd. einfach keinen Hunger hat. Z.B. bleibt teilweise der komplette Nachtisch übrig.
Das hat dann wenig mit den "Resten" gemein, die übrig bleiben, wenn ich mit meinem Teller fertig bin. MMn. ist das ein ähnliches Vergehen, wie Lebensmittel aus den Mülltonnen von Supermärkten zu nehmen. Warum gute Lebensmittel wegwerfen?