Earlier quoted context omitted.
Apple is quite explicitly uninterested in artistic expression on the app store. From the second paragraph in their guidelines: "We view Apps different than books or songs, which we do not curate. If you want to criticize a religion, write a book. If you want to describe sex, write a book or a song, or create a medical App." Their stance makes very little sense (arbitrarily dividing games away from books or films), bu…
I strongly suspect they wrote that expressively in case a court ever looks at Apple's policies, and needs to decide if Apple is silencing art/freedom of speech. Essentially they want to separate themselves from most existing legal precedent.
Why would that end up in court? Apple is a private company. It's free to include/exclude whatever content it wants. Consumers don't have a right to force a company to provide the content they want.