Why would anyone care which app created photos in a photo folder? I mean ask the user a permission for read/write access there, sure but once the photo is saved

Why would anyone care which app created photos in a photo folder? I mean ask the user a permission for read/write access there, sure but once the photo is saved or should no longer which app created it. Same goes for other for types. Sometimes I want an to be able to access all files on my phone as well. The whole thing sounds like huge step backwards and frankly just bad design.