It’s such a difficult task to argue for change when people are predisposed to supporting the status quo, particularly when your opponents can just spread as many lies as they want without sanction or even the need to publicly acknowledge their wrongdoings. It’s a very different situation to, say, the same-sex marriage plebiscite where there was a much higher chance that a voter actually knew something about the issue and the people whose rights they were voting to support or suppress. I’d guess that even the average Yes voter would be woefully uneducated on the history of Australia and not really understand what they were voting for or why it was important.