In defence of Dick Smith ... (what am I saying ???) .... I think he is saying that the Pilot's "mind" may have ignored the alleged GPS warning signals... not that the PIC made a conscious decision to ignore them.
I have no doubt that, in the midst of a busy/bumpy/tricky approach, such a thing could happen. I know I've been subjected to sensory overload on occassions.
Having said that, is there really any way to totally remove the possibility of such things happening ... short of a robotic arm sliding out of the panel and slapping you across the face?
Human Factors are Human Factors ...