There is no legitimate use of generative AI
As much as I am in general agreement with your sentiment, I can think of one legitimate use:
Entertainment! (its all AI-generated based on an image prompt, "Fake Image"... and then I also gave it a little instruction for lyrics and music style)
as there is no legitimate use of flooder scripts outputing random garbage on this forum.
And the AI garbage will assimilated and regurgitated in an inbred form the next time somebody asks AI for help writing something stupid.
Originality is key and a scarce commodity.