Don't know what the TAF or TTF said but YSCB must have been ok as a QF A330 MEL SYD held east of YSSY before diverting there at the same time the 738 went to RIC. Maybe the Jetconnect fellas didn't have enough for CBR?
Either way who cares? They did what was legal and landed safely.......
If you blame anyone blame QF fuel policy?