It's just another tool - synths are computer generated as well, so what does it matter whether a computer or human decides to push the button?
At the end of the day it's humans that will use the tool and combine it how they see fit and it's humans that will decide whether it's any good or not ...
I totally agree with you actually - but the tooling here is for producing content, not for composing music (like your synth example). It's exactly the same as MidJourney - the target user is not the artist, but the regular user. I wouldn't be surprised in a couple of years we have terms similar to "buy local", but for content generated by AI - like "buy human".
At the end of the day it's humans that will use the tool and combine it how they see fit and it's humans that will decide whether it's any good or not ...