Actually, in a place like Australia, its more important to be able to launch without an alternate to destination, as quite often it would require huge amounts of fuel to be able to do it (more than is practical or often possible to carry).
A "large international airline" most certainly does do this operating into Australia, operating using effectively a PNR between the destination and another airport above certain weather minimas... only if, at that point, the destination is above certain weather minima may you continue to destination.
But... you're only going to do this if it complies with your fuel policy!