I don't understand. Don't Android apps have unique users? Like app_xxx? Why couldn't the fuse filesystem just set the /mnt/sdcard to be owned by root (chmod 644

I don't understand. Don't Android apps have unique users? Like app_xxx? Why couldn't the fuse filesystem just set the /mnt/sdcard to be owned by root (chmod 644), and app directories owned by app_xxx (chmod 660)? That would fix whatever read permissions on apps could be leveraged from being in the sdcard_rw group. Access to read sdcard files has never been an issue, sdcard permissions have been granted. Anything that didn't require sdcard permissions would be in the /data/ directory. Someone please explain this?