A few facts about that incident:
The crew did two GA,s that day, the second one off 16. On the second GA TOGA was correctly applied, they then diverted to Avalon.
On the first GA the crew did not continue the climb to the GA altitude of 4000'. For some reason, not properly explained in the report, they flew level with the gear up at an altitude that set off the "Too Low Gear" warning. That warning was cancelled by the use of the Emergency Cancel button.
The PIC had never flown for AN but had been one of the many pilot beneficiaries of the Impulse purchase by Qantas.
Any suggestion that the incident was somehow the result of AN SOPs or culture is complete fantasy.