That would hardly be the end of the road. If copyright enforcement gets stricter then that will give a market advantage to the largest, best funded major AI com

That would hardly be the end of the road. If copyright enforcement gets stricter then that will give a market advantage to the largest, best funded major AI companies like OpenAI because they can afford to simply buy licenses from copyright holders. I predict that we'll see new middlemen arise specifically to handle this licensing, much like the agencies that handle most music licensing today.