If Lu tried to take that "rotor" he had built and fly it back then, we wouldn't have to go through this now! That was not a rotor, and the demo he gave was not illustrating rotor blade flapping.
As this thread has tried to spark, the old myths die hard, but Lu, they are dead.
It is not a "different way of saying it." It is not an "old school" vs a "new school". The experts then knew it was wrong, but it was close enough, so they let it slide, and a few generatons of plots and mechanics "knew" it was gyroscopic precession. The designers and engineers knew the real story, the old school had some very bright people in it.