What other flight path were they going to fly until they were done with their calculations? There was a time early in the flight when they weren't sure they would have enough fuel to make Reno. Until they were sure what other path would they take? Why couldn't he have known this? Given the orders to fly with the stairs down, the flaps at 15 or 30 degrees, altitude at 10,000 feet, speed around 170 mph, and head south, what other flight path were they going to fly? (at least until the calculations were done) You don't think he could have anticipated this?