What Apple does is curate the store to their standards, which makes them the decision makers on what is and is not acceptable. Copyright is a large and nuanced

What Apple does is curate the store to their standards, which makes them the decision makers on what is and is not acceptable. Copyright is a large and nuanced legal issue in which they can't be the final arbiter, so why would they want to expose themselves to that hassle? This exact issue is a great example: according to the "copiers", they have a legal right to release the app. Whether or not they do is not up to Apple to decide.