In a post-scarcity solarpunk future, I could imagine some reasonable uses, but that’s not the world we’re living in yet.
AI art has already poisoned the creative environment. I commissioned an artist for my latest solarpunk novel, and they used AI without telling me. I had to scrap that illustration. Then the next person I tried to hire claimed they could do the work without AI but in fact they could not.
All that is to say, fuck generative AI and fuck capitalism!
I'm not a fan of copyright in general, but I'm not sold on there being any ethical issue with scraping images to produce training data. People can cry "Copyright infringement!" if someone is using a machine learning model to produce something that's recognizably derivative of specific work present in the training data. However, I don't think it's appropriate in most cases, as the output is often transformative. Also, if you want to go down the intellectual property rabbit hole, a lot of art websites put in the ToS that works could be sold as training data by the controlling entity of the website (at least until people got up in arms about it in late 2022/early 2023).
TL;DR: In my opinion, the output is too far removed from the input to warrant people from getting a slice of the pie, and most people didn't have any basis for a legal argument until about two years ago.