One pilot solo can correct for CG issues? Is that not a gross oversimplification?
Compare an R-22 to a Chinook...and yes...one can fly a Chinook Solo (physically not legally).
What effect does a single pilot have on lateral CG of a Chinook? Being tandem rotor...the rotors turn both directions as well.
Better yet....Bell 205's routinely are flown solo from either seat...how does that square with your theory?