Okay, well my hobby is ethics.
And the thing is, if they are using works written by others to build an AI for profit without permission, that's exploitation. Copyright law is horrible and exploited by corporations constantly. That doesn't mean we shouldn't cheer on the little guy when they try to use it to defend against exploitation by corporations. Because the big tech companies are exploiting creatives in their drive to build and sell this tool. They are exploiting creatives to make their replacements. So I'm going to go off on any comparison analogy.
Whatever the actual basis of the lawsuits against the AI companies, actual lawyers do think there's a basis in IP law to sue because a few high profile lawsuits have been filed. And clearly there is some legal basis to sue if they use AI to create using performances, or this contract would not have been proposed.