Listen very carefully, Flying down to the ground in poor vis below the minima is no more dangerous with 2100 kg on board versus 525 kg, both are highly dangerous manoeuvres
One has the option to go around, the other doesn't.
QF would have had 2200kg on touch down, if they did go around they would have been down to 1400kg and possibly facing worse viz than on the first attempt and maybe having to coordinate with other aircraft also experiencing fuel issues.
You seem to hang your hat on the rules keeping you safe Gazumped, they won't always keep you safe. Over and above any rule is the Captains responsibility to keep the passengers and aircraft safe, they are specifically empowered to break any rule they see fit to achieve this outcome. Both Captains did just that. Well done to the four pilots involved.
Framer.