I wonder how Boeing are such experts on the place, as no Boeing appears to have operated in there; Druk Air, the only operator to use the airport, has Airbus A319s, and before they introduced those they used BAe146s.
Just before touchdown there's at least one of the BAe146 in view, perhaps they use them short haul/VIP within the region ? I should imagine that the turbulence experienced when windy would make the PIC 'concentrate' during the approach
SHJ