Thank goodness they
types like you out of safety departments a long time ago. If we didn't, we would still have the infallible 'Captain as God" types still flying the line, where we just sack people because they make mistakes and move on without trying to learn anything.
We are human, we are
ALL screw up, and we don't get to choose when we do it. Landing on taxiways is a known phenomenon, this one just happened to be more populated than previous events.
The two guy's up the front didn't set out to screw up, the mere shame of ending up as the subject of a multi-page PPRuNe forum topic is horror enough. Let alone the true realisation of what might have been. These guys are likely to be irreparably psychologically damaged, and may even have their careers & families destroyed by this.
Aviation has moved on from previous era's of "just excuses, try harder, don't screw up", and it much safer for it. Aviation is a highly complex, stressed ecosystem with many more moving parts than just the pilots that concentrate large numbers of humans and dangerous goods into small areas at high velocity. It is a damn dangerous business, and we manage the risks exceptionally well because we have learnt that screwup can an do occur, even with the most simple and obvious task.
You can help improve the system, or you can just throw stones.
It's funny, as I am halfway through Fate is the Hunter [movie, 1964], everyone wants to hang the Captain Jack Savage out to dry...