More likely simply responding to the small demand for GA that exists in CB.
You’ve mixed up cause and effect.
The small demand for GA that exists in CB is caused by a combination of the delivery of a monopoly public airport into the hands of a private individual who’s charged GA tenants and users to their knees, CASA over-regulation and ASIC nonsense.
But let’s talk about how the ‘airline industry’ is treated at CB. Don’t divert there without having a briefcase full of cash or a credit card with a high limit. You’ll be blocked from pushing back until you’ve paid the ‘special’ charges for having had the temerity to divert there. There’s a description of the kinds of places in which these kinds of things happen in aviation: Third world.
At least we can all get some consolation from the fact that we’re all contributing to the owner’s continuing ascent of the Rich List.