Every human artist that ever lived(to my knowledge), heard, or saw someone else create a similar piece of art, from which they were inspired. If I create a song right now, how is that any different than an AI doing the same from being trained on copyrighted music. Certainly my song will be entirely made up of elements i've heard before, however large or small. An ML model is doing the same thing. There is nothing truly original in art. Artists are just filter and amplifiers of what they've heard, seen, and like. Your copyright does not permit you to restrict others from being inspired by your work, or using it for inspiration.