I think this is intended for advertizers. I have seen lot worse music mostly for products aimed at kids and they likely take 1000s of dollars to write and record.
You aren't comparing the same thing. Custom produced thing is entirely different than buying samples. You still need musical talent to work with library music.
I agree that the quality isn't ideal, but I think this tool helps artists iterate much faster and cheaper. I wouldn't focus on the quality of the output, beyond the threshold which allows the artists to generate a reasonable idea of what they eventually want to make.
Think about all the hard work that traditionally goes into composing a single title. Artists will spend days, weeks and sometimes months trying to iterate on ideas. Writing, composing, demoing, tracking and recording, mixing, etc. Think about all of the expensive software and hardware that goes into this process (instruments, microphones, studios, DAWs, VSTs, etc). It's an expensive and difficult process, it's very manual, very sequential.
This could easily be used to speed up that iterative process. Just ask this software to generate 100 ideas for your next bridge, and iterate that way.
I find this very useful as someone who's just learning how to play the guitar. My knowledge of music theory is still limited, and it'll take me years to get to a place where I can express myself in a way I'd deem "satisfactory". I just visited this page and plugged in my lyrics, and it arranged them into a beautiful song for me. It did it just how I imagined it, and that's terrific. Now I can ask my guitar teacher if the chord progressions make any sense, and if so, then we can transcribe it. I don't know who else this would be useful for, but I could see myself paying for it depending on how they develop the tool.