A good outcome does not indicate an effective decision making process. Plenty of people have made appalling decisions over the years without a bad outcome. Some people have made extraordinary decisions in diabolical situations and not lived to see the next dawn.
Every decision to stay has significant risks. The point often lost in the QF32 incident was the crew had the ability with QF procedures to disembark with slides and not as an evac. This allowed them to nominate which slides they wanted to use and to do it at a more sedate rate that minimised injuries- ie they could have used main deck only slides and taken their time to get set up properly on the ground with appropriately briefed ABPs to assist.
So if a 'good decision' is made and because of that decision a number of pax are injured and some die, whereas had that action not been taken all would have survived uninjured. You would still defend the decision as a good one? Interesting logic.
The word decision implies that there are alternative courses of action. Those who claim 'this is a no-brainer' are effectively saying there is no 'decision' it is an automatic action. Easier to automate out flight crew when everything is 'no brainer' - like maintain pitch and power (another no brainer action proposed in other threads).