Howabout,
It's nothing to do with zealots, and everything to do with international law, period.
All the cases you mention of purported restricted airspace in international airspace have no legal standing, notwithstanding claims otherwise in any national publications.
The US is a very good example, they are one of the few countries that assiduously comply with the law. Thus, all US mil. practice areas outside the 12 mile limit are designated Warning areas, in accord with ICAO recommendations.
The reference to "Class F" and "clearance required " are mutually contradictory, it is either Class F or it is a class of airspace (E IFR or D and up, all cats. of flight) where a clearance is required, it cannot be both.
The fact remains that the volume of various kinds of mil. airspace in Australia is ridiculous and a major financial impost for no valid reason.
Tootle pip!!
PS: At least it was not as bad as when I started flying, where all airspace above Sydney, from about FL290, was R, H24, and we used to have to commence descent about a 100nm before desired, to remain below RAAF R airspace.