Of the two threads, comparative criticism is far more pro-business. You can be a megacorp or a 10-year old kid and violate copyright under the compare-the-texts approach. That makes comparative criticism divisive, and if comparative criticism==copyright, then that makes copyright divisive.

But if our interest is in making sure that money is distributed fairly when there's money on the table, there's a century of copyright jurisprudence focusing on that question, not micromanaging artists.

6/7