I too wonder if they had used any of those helpers. Seems like it was a known, airfield approach and she was a human who may have relaxed at just the wrong time with task familiarity. We have all been there.
Glad she and her crew are still with us that we might all learn how to avoid the trap that got them.
I will go out on a limb here: they were not wearing NVG. If they were, I would expect extreme hysteria about the dangers of NVG.
Nevermind the extreme dangers of not seeing the ground!