Not sure how it makes sense in your head, but it is a bunch of jibberish.Too much fluid can cause turbulence in the system, which acts the same way as cavitation, but does so because the fluid cannot flow properly due to excess fluid.
The causes the pump to either "starve" for fluid or to draw excess fluid. The excess fluid drawn overloads "stresses" the pump and causes it to whine much like cavitation.
Too much oil causes the oil to hit the rotating components, like gears, which in turn will introduce a lot of tiny bubbles, which in turn will cause pump cavitation. It’s that simple.