9.G, I agree that OLD provides a better basis for landing performance, but it is only a basis, which has to be evaluated against the current situation before landing.
It’s not necessarily
‘incompetence’, but the normal variability of human performance, both in flying and judging the risks in a situation. There are good examples of these in the
Boeing analysis - pages 8-13.
In addition to the three main items of aircraft control - touchdown distance, speed, and spoiler / brake application, there is combination of circumstances, such as tailwind and medium / poor braking (Table 1). Also note the distance margin used for the normal (non-long) touchdowns; up to 20-30% of the available distance.
http://www.superstructuregroup.com/R...M_Analysis.pdf is a good example of how to manage the threats and risk of error when landing; these aspects still apply even when using OLD.