There is a few events the last 20 years now that seem to show a cultural issue at QF that its ok to bust a minima without telling anyone that you will do so, which then leads to a few other assumptions of how they view minima
That's a very broad statement to make. I'm sure you have a list of the dozens of such occurrences in the tens of thousands of Qantas flights "in the last 20 years".
Personally, I've sat on the ground in visibility less than half that required for landing as Qantas aircraft diverted in all directions and other airline's aircraft (with their alternate fuel apparently) landed in visibility that miraculously and significantly improved for the few seconds they were approaching the minima. It was a common occurrence before Sydney and Melbourne had Cat II approaches.