Those are good examples of civilian uses, but they know who is really buying it. The product description for the first one I clicked:

Communication without interference. FPV through fiber eliminates the influence of radio interference, jamming and EW systems. The transmission of the fiber signal guarantees 100% stability - no "subsections" of communication! The transmission of the drone control on the optical cable works where the radio signal is powerless: in tunnels, bunkers, densely built urban areas and areas of active suppression.