It's not a delusion- it's most likely a fact that most pilots will ignore this requirement or will not read the NOTAM or AIP.
The NAS plan approved by the Aviation Reform Group which included the current Chair of AsA Angus Houston and the heads of just about everything else in aviation clearly stated that such calls should be on the multicom frequency.
This decision has not been rescinded .
Notice how no " named " person from CASA is identifying with this requirement.
But I bet they will all harden their views - can't possibly admit to making such a basic error!