I agree that VA will no longer run flights for the sake of market share/because they can. But CBR-SYD flights are an important feeder into the rest of the network... even if the CBR-SYD flights don't make money on their own, they may be a loss leader that brings enough overall value to the rest of the business to justify their existence.
Canberra is a bit of a weird one, its essentially a public service market which is actually pretty high yield, because its not price sensetive - mostly "other peoples money", if an airline does not fly CBR-SYD, CBR-MEL and CBR-BNE then its essentially ruling itself out of contention for the entire Federal Government spend - anywhere from lobbyists to all the federal government departments such as Defence/Immigration etc, a pretty large market that is totally unaffected by recessions, tourism and Covid-19, something I would have thought an airline struggling to get profitability would go at.
The new VA2 obviously has the wrong equipment to do frequency on SYD-CBR but I would argue that VA must serve CBR in some capacity as all the aviation decision making is done in Canberra, and in the federal sphere, so a lack of presence in CBR means that all aviation industry decision making will take place in the QF Chairmans Lounge in CBR, not something I would risk if I were Bain.
Once the state borders issue is resolved, and if the country is going into recession with international borders essentially closed then all airlines will need to adapt their networks to suit the customers and markets, whether it domestic tourism or markets unaffected by the recession (e.g. government, resources industry, etc).
Other comments about Rex being a natural fit with the new VA2 are obvious to everyone in the entire world except the board rooms of Rex and VA, I thought the initial Rex talk of jet operations in the golden triangle was simply positioning/posturing and/or an "plan B" if VA2 was dead on arrival and went into administration, but Rex are serious and are still recruiting, and there is a sizeable unemployed workforce and many aircraft available cheaply either through ownership or lease, if Rex did go with the golden triangle jet option then they are only carrier that can get you from one capital to another regional destination in a different state on one ticket, besides Qantas, they already have terminal space and staff at airports and this would give them a massive advantage in getting both federal and state government travel as well, and at a lower cost base than Qantas. Remember -
Rex will never be allowed to go broke and shut down as long as people in the regions vote, and if Rex are comfortable enough to back themselves then they might be the only competitor to the Qantas group armed with endless subsidies and state and federal government support.