It's not that it's not the easiest place. It's that it's impossible. If you have a minimum required staffing level, there is no scope for savings from increased productivity. They might be able to accomplish all their tasks better in half the time, but they'd still need to pay someone else to be on site for the rest of the time.
If impossibility was a foregone conclusion, why try it in the first place? I appluad them for doing the study in this place.
You also won't find the value if you try it in the most difficult places.