I think we have to look more closely at the human factors in this incident. I suffered a nervous breakdown in the air, to the degree that I was effectively a passenger in the LHS while the FO stuffed up an approach. No harm was done, and we landed safely. I hadn't realised what had happened until I saw the FDR readout, at which point I fell apart, and haven't flown since (ten years now). It's only by sheer chance that nothing worse happened; I was a ticking bomb. The cause? Stress, overwork, fatigue. All the things we don't think we suffer from, and the regulators can't (won't?) do anything about.