I believe you have hit the nail on its head here, This bare minimum approach of almost everything is like an ideology and that's why our collections by and large will be second rate compared to overseas collections.
Considering biosecurity restrictions greatly limit what Australasian zoos can import, it’s more important than ever that we succeed in maintaining viable populations of the species we have.
While I appreciate some phase outs are inevitable due to a lack of availability (the Southern black rhinoceros may one day fall into this category); I would hope where there’s the option to import, the initiative will be taken to do so.