High G issues? push the nose down 2.5 degrees on a high G manuever?
I think this is the main point. It doesn't hopefully succeed in pushing the nose down but loads the controls in a manner that is equivalent to such an AND input - a load that mimics the aerodynamics of a different aircraft.
In a high g manoeuvre the pilot is not lightly to suddenly let the nose attitude be ripped from his grasp but would naturally accept the stick loads being enhanced.
Real training required.