There are lots of routes that one alliance or other doesnt serve.
BTW it isnt an extra 10 hours over direct.
QF22 NRT-SYD dep 2035 arr 0700+1 (so OZ/OZ an extra 5 hours trip time)
QF60 NRT-SYD dep 2125 arr 0950+1 (so OZ/OZ an extra 3 hours trip time)