May have been part of the rejection or others may say non acceptance of the Republican referendum . However my impression or main reason and indication was the model or lack of preferred model . Should have been 2 questions , Should Australia become a republic , yes or no , Then at least 2 options for a preferred model . Just based on public sentiment at the time , quite sure the i st proposal would have got up for Australian to become a republic . Question 2 , probably not a sufficient consensus so referendum still would have not succeeded . Will have to have a fairly good or clear broad based type of consensus for a preferred model in some future time to get another Republican proposal up .When you look back at history it is fair to say as so called parents of this nation ( Australia) England now part of the UK would be rated as somewhat dysfunctional parents. Children of bad parents who make it in life don’t necessarily worry about changing their parents and in a lot of cases not even their names because it is only symbolic.
From my understanding of the last referendum the strongest argument and most likely the prevailing one was that our current system ( the system itself works) and the case for change other than our growing distancing from traditional England did not offer a better systematic alternative other than being potentially problematic…
I btw personally don’t care much for the English monarchy.