As far as I know they not only lower the center of gravity with the ballast but they also can put the weight where they want it to be and move the center of gra

As far as I know they not only lower the center of gravity with the ballast but they also can put the weight where they want it to be and move the center of gravity to achieve a better weight distribution. So the effect on handling is more than just lowering the center of gravity but your point still stands :-)