People who never had the misfortune to work with a truly toxic manager or co-worker are often oblivious to the damage they can cause. I'm speaking of psychological damage, burn out, anxiety, stress, depression, health problems. Naming their abuser can be helpful to people who had to endure such a thing.
Sorry Nat, but I don't think it really answers anything. I would argue that using GPL code during training falls under Copilot being a derivative work of said code. I mean if you look at how a language model works, than it's pretty straightforward. The word "code synthesizer" alone insinuates as much. I think this will probably ultimately tested in court.