Are you saying the amusement and levity in the Pilots demeanor, is a sign that the craft are terrestrial and hence “not manevolent”?I worked with defence for 25 years. I know these people. They are highly trained and highly motivated. They would be very keen to go out and catch these things on radar and video, which they eventually did.
They know these things are not malevolent and so do not engage them. I believe the pilot's only motive was research.