Your statement would be correct in the old world. My opinion is, that in the new world the rules and dynamics will change.
The new world, post corona restrictions slowly being lifted to allow some domestic travel to begin with for a long period, in a recession, with high unemployment and social distancing - demand will be savaged - this will be for a while as well.
The government know this obviously, they are modelling it.
There may well only be enough demand to keep QF group going and limp through until the economy and restrictions lift, vaccine found etc.
The economy may not actually support two players again, viably, for several years.
The government may well be of the opinion that chucking money at VA, an airline already with severe financial problems (with more coming if their parents fold) and poor management and a fleet that is not flexible (e.g. dominated by 737s and precious little smaller) might actually not be worth trying to prop up. Virgin want 1.5 billion. The ENITRE aged care sector wants 1 billion....
Also to consider for the government - the optics are terrible trying to save VA - high profily billionaire flamboyant owner who wont sink a cent more in, rich government controlled owners.... and the AU tax payer has to cough up? Ugh, imagine the media....
Tough decisions will need to be made and I do think the government will unfortunately let VA go if they have to.