Easy explanation, consider a dart like used in the sport. Weight is in front to stabilize.
Visualize reversal, tail feathers in the back like normal but this time also the weight.
The weight is now after pushing the dart rather then forward and pulling it.
Destabilizing but increasing maneuverability which is pretty much defined as the ease of changing direction.
World class aerobatics pilots will know exactly where the sweet spot is for their aircraft.
As far as your fears about CG, consider that the aircraft has been designed and approved to be perfectly safe between the two CG limits.