Earlier quoted context omitted.
That's not what they're claiming. They're claiming that the models were trained on copyright material[1] and that training models doesn't constitute fair use[2]. Their claims are in the first couple of pages of the court ruling. The claim is not that the style is copyrightable but that producing work in the same style could affect the market for the original product which is one of the parts of the four factor test f…
> and that training models doesn't constitute fair use How can it not constitute fair use? They both made no copies of that data (copyright infringement) nor did they commit actual theft by stealing the data from some vault. Everything else is permitted. For that matter, this is equivalent to some human artist studying a piece of art and then starting to create art in that same style too... is that no longer fair use…
If I release software under a non-commercial use license, it is still IP infringement if a company uses it in their business process.