What if you make a game centered around creating your own music? What if the player wants to create his own sounds to be used with the music? It would be cool to synthesize audio in game,.
What if the way the sounds are mixed is dynamic? Then it wouldnt be possible to make just one sound for it.
I actually have thought of making a game where you can create your own music tracks. I would have to add all the sounds for all the instruments, meaning I could need 100s of samples uploaded to roblox. It would be significantly easier to just store all of the sound data into a file and then load it into editable sounds when the game runs.
Another potential use case would be for making emulators of systems that have their own sound chips. Although this would require making the audio generate in real time.