Just like you could lose a physical book or the publisher could disappear? It feels like you're doing some reductio ad absurdum right now...

You buy a digital, DRM-free file. It is yours forever. If you lose it (bad storage, malware, deletion), it's gone. It doesn't mean that it wasn't yours. It doesn't mean that anybody owes you a new copy in perpetuity. It doesn't make any of that "fake ownership".