It is your belief that because it spins it is a gyro - it is my belief that it is not - I fly a rotor system that is subject to constantly changing aerodynamic forces - if everyone of those produced a precession, the aircraft would be uncontrollable.
Up to you what you believe from a theoretical standpoint - far more learned people with aeons of helicopter design and construction experience don't believe the rotor is a gyro, I'll stick with them thanks