If I ask to see just a bit of your private documents - I can choose the corner of the document, let's say, the top left - and I can inferr with 70% accuracy who

If I ask to see just a bit of your private documents - I can choose the corner of the document, let's say, the top left - and I can inferr with 70% accuracy who you're getting services from, did I respect your privacy? This seems a bit like smoke and mirrors. Either scan the image or not! Inference from partial images is super cool research for example to deal with corrupted image files, but not for privacy imo.