They were probably disassembled for showcase. They weren't the most resilient of things and eventually enough area of the disk would degrade as to make the disk unusable. Eventually as in, really fast. Every office had a pile of defective floppies marked as corrupted to prevent people from losing their data to them. Essentially you could format and write on them but reading was impossible or returned garbled data. They were comonly disassembled to showcase how they worked and to experiment as they were a cheap source of ferromagnetic coated cellulose.