I challenge you to prove that making movies which are based on public domain content does either. This is rarely a "Science" debate and more often an economics

I challenge you to prove that making movies which are based on public domain content does either. This is rarely a "Science" debate and more often an economics debate. Which is better? Wizard of Oz in the public domain so Disney can make movies with out paying a royalty? or Mickey Mouse not in the public domain so you can't make movies about him?