AIP Australia for GNSS procedures:
An aircraft which is not required to hold or to lose height in a holding pattern may commence the approach without entering the holding
pattern if:
c. for procedures using GNSS:
(2) in controlled airspace, the aircraft is being vectored to intercept the initial approach segment or is tracking direct to the intermediate fix.
Note to c.(1): The first track of a GNSS procedure must be joined using the tracking guidance provided by the GNSS receiver.
Note to c.(2): “direct to” clearances may be requested to the intermediate fix (IF) provided that the resultant track change at the IF does not exceed 45°.
So, a regulatory requirement (here, at least), not only Airbus.