I have never said they were published. His discussions to matter if he was using those works to support his world to fans and friends. Again he never saw a line between published and unpublished. It isn't clear at what point the "limited match rights" to Tolkien's other if ever brought to film was added to the deal. It doesn't matter if Tolkien did or did not finish something.
It doesn't matter if the Appendices were meant to be a story or not. They are published works. According to your own argument that means he was fine with them being used in adaptations.