I admit it's odd to me.
Centrifugal balancers(LeBlanc Balance) have been around for almost a hundred years using the "outside acceleration" of the centrifugal force.
We've known since Newton that the first two laws of motion and Conservation of Momentum don't behave as expected/apply in non-inertial systems(where there is an outside source of acceleration).
And we've known just as long that an inertial release from a spinning object has a reaction caused by the sudden change in mass distribution relative to the axis of rotation.
And yet ... combining these facts in one demonstration unit causes cognitive dissonance.
It's a truly odd situation