I think the 'human behaviour experts' were test pilots. They design, test and approve all sorts of things with their own (very poor) concept of what constitutes a typical line pilot in mind as they do so. Their views are reinforced when they show prospective customers what they have dreamt up. Airlines don't send their worst pilots to look at new concepts, they send their best. Their 'club' also extends to the staff in certification authorities. They got to be where they are because of their background, the same that of a test pilot. What we need are airliners with systems designed by very poor, below average pilots capable of been flown by the very best.