Yes, but to enforce those decisions in other cases there would still have to be other lawsuits. And I just don't see that happening on a large enough scale to change the industry

Maybe I'm wrong though

The point is that OpenAI (and others) will need to change their training pipelines to ensure there is never such a threat of a lawsuit.

Which, to be clear, is absolutely a good thing and what they should have been doing from the start.