Sorry, Centaurus - I must disagree with you there. If the fix is simple why not do it? We do not seek 100% fool-proofing, just closing gaps where they can be easily closed. Where would you stop with the "disregard of the principles of good airmanship" - would you never have installed EGPWS - good pilots do not fly into terrain? Maybe disable the gear/flap warning horn - we ALWAYS put the gear down to land, don't we?
"If the checklists and scans had been followed etc etc " - 100% agreement, but they were not. Let's not have professional pride blind us to the need ALWAYS to move safety onwards, and let's never forget to remember the Lowest Common Denominator?