I could be wrong, but I think the use case here is mainly for non-artists in domains where the music is not particularly important.

For example, a podcaster/youtuber may want a short intro track. An entertainer or a marketer may want some generic or silly background music.

Does it have a use case for a producer/musician? Maybe. It might give them ideas for chord progressions, melodies, etc. But real music does that too, and much more effectively.