I don't understand. If I make a painting (hell, or a whole animated movie) in the style of Studio Ghibli, am I infringing their copyright? I don't think so. A style is just an idea, if you want to protect an idea to the point of no one even getting inspired by it just don't let it out of your brain.
If the produced work is not a copy, why does it matter if it was generated by a biological brain or by a mechanical one?