I spoke with Legal Aid.
I understood that the Principle of Open Justice means that my statement would now be a public document.. Police don't get to decide that. It is available to the public but would have my full name and full address removed. (The media already had my name and address anyway.) Once it's out in the public there's nothing to stop it from being used in books, movies, etc. There is no law in Australia regarding invasion of privacy.
I have anxiety issues so it's very possible I misunderstood what they told me.