Pardon my dandruff while I scratch my head.
Seems to me the job of the cargo dispatcher is to plan the pallet etc. loading to optimize CG for the loaded aircraft. Given a random selection of heavy vs light pallets, he's got some pretty powerful levers to pull. And a loadmaster-type computer package to do 80-90% of the work.
I realize that a positioning flight gives him fewer tools - so be it. But what am I missing?