I agree with the courts. I don't think learning from something is piracy in anyway.
Obviously though this is a very different issue to what the OP was claiming. In that case there is no legal argument at all that they could train on it and the argument is there about moral rights.
Also, you learning something is different than a model learning it, because a model is not a person. You can learn from a book and sell the skills you gained from it, but you can only be in one place at a time. The model can serve that knowledge to every person on the planet simultaneously. We obviously need new laws since this is a fundamentally different situation.
A model is not a person -> we need to write new laws. This is not a job for the courts but for us as a society.
The rest of my argument -> information that helps the courts decide, which generally will look at precedent with humans as that is the closest proxy. When you extrapolate from the law as it pertains to humans, the duplication of books for distributed training seems illegal.