But the normal flap setting is 30 degrees, unless they know they are landing at a short runway.
Very true. 30 degrees flaps is standard. I’m sure that is what they were running on the landing at this airport.
I don’t understand why people are flipping out about this especially getting the aircraft out of that airport.
As long as they are empty of passengers and cargo, they have a good headwind (not difficult in the plains), density altitude is good, and loaded with minimal fuel they should be be able to a roll out and take off well before the hitting the numbers at the other end of the runway.