This is why the tool is the holy grail for asset extractors.
When Bohemia Interactive releases assets or when modders compile their work, .p3d files are often saved in a "binary" format. This is a compressed, machine-readable version of the file. While optimized for the game engine to load quickly and run efficiently, binary files are notoriously difficult for humans to read or edit. They appear as a wall of garbled text when opened in a standard text editor.