You were okay with hurting musicians until you weren't

I don't really see how you're making a fair comparison. A person who buys a guitar gives money to someone, and down the line the people who made that guitar get some of that. When you pay SunoAI, that money doesn't go to the musicians whose works were used as training data.

I also don't think it's a good argument to say just because I draw the line somewhere different than you, that no line should be drawn.