Your simple experiment Is confirming the OPs statement that all iPhone X’s have this so called ‘huge defect’. Where in fact if you were to continue your simple experiment with other iPhones, different manufacturers phones and cameras, the same ‘huge defect’ will also be present, concluding that it is an expected effect inherent in almost all modern cameras and not unique to the X.Sorry but your response to my comment is confussing. I am talking about my iPhone X compared to the same iPhone X demo units in the Apple Store. I have not tried any other phone makers’ cameras.
My simple experiment is limited to iPhone X so I’m not misleading anyone.