The military in Australia, mostly the RAAF, has a very negative effect on ALL aviation in Australia, but particularly light aviation, because of the vast tracts of restricted airspace.
What year / century are you referring to?
LS, when was the last time you flew as PIC in a light aircraft through military airspace in Australia and were you denied a clearance that time or any previous times?
If you’re talking “very light” aircraft such as RA-Aus, the RAAF have worked very closely with RA-Aus to implement some VFR routes to open up such airspace to make it easier and arguably safer to navigate through it. That is an overwhelmingly positive result.
I say again, the good old days from your own words on many of your previous posts, weren’t so “good.”