The way the copyright is falling so far makes perfect sense to me, if you think about the purpose of copyright.
Copyright is an artificial restriction on the natural right to copy that which you see or hear, for the express purpose of encouraging creative people to produce more creative works by giving them a monopoly on the sales and distribution of their own works, whereby they can monetize said works.
For one, AI is not a person, and so is not eligible for copyright by default. Therefore works created by AI are not copyrightable (that is, they are free to copy by anyone).
Secondly, AI is not susceptible to outside encouragement like a person would be, so there is nothing to be gained by extending copyright to AI.
Therefore, all AI generated works are public domain, and that's not likely to change with further legal cases.
This should make creatives everywhere very happy, because it means the only way someone can have a work that they can control the copy and distribution of is for that work to be created by a person. That means nobody will use content that is exclusively AI generated unless they literally don't care about people copying it and sharing it.
How many things don't happen simply because there's no money in it? That's the category pure AI generated works will fall into. They will exist, but they're going to be completely dwarfed by the number of AI-assisted works out there, which ARE copyrightable, except for any portions that are exclusively AI generated.
Basically all that's really going to happen is artist's tools are going to get a massive upgrade as AI matures.