It’s probably not that, roundsounds. It’s probably that there is insufficient corporate competence to understand the level of resources and expertise necessary - with the attendant cost - to keep educational material up to date.
The recent stuff up with the recommended altitudes for ops in the vicinity of Moorabbin / Station Pier is a manifestation of many ‘disconnects’ that are, in turn, a manifestation of fundamental degradation in the corporate competence of CASA and Airservices.