Most definitely. Without The Queen we cannot have the Australian Crown; all we would have are seven offices  either filled by politicians or under the control of the politicians. The point of the Crown is that it is a check and balance against the exercise of power by the politicians.
As Lord Acton once observed: “Power tends to corrupt; absolute power corrupts absolutely."

It is for the republicans to work out a model which the Australian people can consider. At the present time the republicans are demanding a republic, but are unable to say what sort of republic they want. They now deny that they also wish to change the Flag, something they pushed in the nineties.

In the meantime millions and  millions of taxpayers’ funds have been diverted from such matters as education and health to fund their search for a republican model- the Republic Advisory Committee, the Convention election, the Convention, the Referendum, the 2003 -2004 Senate Inquiry and the 2020 Summit.