The shallowness shines through, the ensign and BRG show clearly...
Prost and Moreno? I will declare quite frankly that those particular races, the Formula Atlantic events on the piddly Calder circuit, were those least deserving of the 'Grand Prix' title.
Ensign, I covered (I think adequately) the point you've again raised the point about applying the 'Grand Prix' title in a haphazard fashion. You might like to read it again, the decision was made in the late thirties that there would be only one event in Australia called by that title annually. I added that this rule was broken in 1946 (the NSW Grand Prix at Nowra Naval Air Base) and 1958 (the Melbourne Grand Prix named for Stirling Moss and Jack Brabham disputing it in then-current F! Coopers), I forgot the Patriotic Grand Prix in Perth, which raIsed funds for some aspect of World War II in 1941 and the Victory Grand Prix held in the euphoria of the end of that war at Caversham in WA.
However, there's something else I feel needs to be taken into account. Using French terms such as 'Grand Prix' is not a natural thing in Australia, it takes some serious application and would have been even harder to sell in the twenties and thirties. My parents, for instance, with country backgrounds, could not pronounce it correctly right through the sixties and they were not alone.
So the application of that name to an event originally termed '100 Miles Road Race' at Phillip Island in 1928 was a very serious attempt to elevate the status of this race. It was the main motor race held in all of Australia each year. Even at Phillip Island, the 1933 Grand Prix could readily have been overshadowed by a 300-mile event celebrating the centenary of Victoria, it wasn't. The Australian Grand Prix prevailed.
The only one of the races I listed which could fall into the realms of a 'minor domestic race' was the 1927 affair at Goulburn.
So why have I landed heavily on the ensign and BRG so heavily?
Because they mention Prost and Moreno as examples of races of local stature won by a visiting driver of international stature.
Have they not heard of the 1956 Australian Grand Prix at Albert Park? Did they not note that it's not in my list of races won by Australians?
Featuring several then-current F1 cars and drivers and run over what was then close to a full Grand Epreuve distance, surely it counts?
Should I also delve into the Max Stewart reference for its ills? "A couple of F2 races which happened to have a portentious title" indeed...