The specifics of jumbo jet manufacture really has nothing to do with my point. The point of my comment is that there is a very evident and very clear discrepancy between human intelligence and animal intelligence.
It's always fun to watch a clever squirrel find its way into a bird feeder, a cunning fox outsmart a rabbit, or a curious monkey recognize himself in the mirror. These are signs of sentience, sure, but all of those are far cries from what even an immature human is capable of, and this obvious evidence is what leads us to believe we are smarter than them. It's not arrogance in any sense.