I’d love to have this feature. There are many legitimate reasons for wanting to write files to the phone. And also to be able to delete folders would be awesome too. I can think of many things I’d strip out of the phone to streamline it.
As for worrying about creating folders and that leading to new ways of hacking apps, PSAS can already create folders on the wave.
I can’t see how this will lead to more advanced methods of spoofing myself, as the key to that is in the DB entries, and these cannot be messed with or you brick your phone. So even if you could create a new folder, you’re not going to be able to then link that folder with the DB entry and subsequent icon that launches the app. That would only happen if someone then made a program that loaded the DB, and sorted/formatted it into an editable entity.