US heavy bombers can cover the entire indo-pacific from there.
Taipei is less than 2,700 miles from Darwin.
Round trip on a single tank of gas for every bomber in the US fleet...to everything China cares about.
And Taiwan is exactly how far from China? While the Doorstep generals are conducting woke training and drag queen contests, the Chinese will be across the water and exterminating the Taiwanese. Will be too late for the heavy bomber drivers to shed their drag queen costumes to be of much help.
On the doorstep means near Australia, not in Australia.