Given that LAN seats SCL-SYD are so easy to book

perhaps someone should convince CX to open a flight HKG-SCL with an intermediate stop. PPT is a bit out of the way but NAN isn't too far off the great circle and given SQs interest in onward flights from Oz, perhaps MEL would be a good choice.
Great circle
HKG-SCL 11616
HKG-MEL-SCL 11623
HKG-NAN-SCL 11837
Happy wanderings
WF