So leave him out of the training set… the impact will be minimal
That's the entire issue and the point of his attempts to poison his music from AI training: you can't opt-out of having your work used to train GenAI. I'd encourage you to watch his video.
GP clearly understands this. The comment makes perfect sense in the context of the thread. It is directed not at the artist, but at those who believe that AI companies training on art without permission aren't stealing anything.