I think that, considering the goal of ensuring the LLM doesn't directly reproduce the training data, it really doesn't matter. I don't think trillions of characters arranged into words so something can spit out the most likely combination of those words back at me really has anything to do with how those words are sourced.
I also have no issue with piracy and think IP laws are currently way too strongly in favor of IP holders. Maybe my moral compass is off or something, idk.