That’s like saying “you can write whatever book you want, but the government can stop it from being sold; we aren’t obligated to sell it in bookstores”. This is a terrible argument; it conflates the government’s actions with the “bookstore”. Yes, if the app store decided to ban the app, we wouldn’t have much recourse. But the government is stepping in and saying no bookstore is allowed to sell it. That is textbook censorship (no pun intended).