Not quite so
Each package has to be picked up and scanned with a scanner attached to the forearm with the probe on the index finger.
Package then has to be stacked in the delivery truck in the correct place according to the bar code number;
or stacked on the correct pallet....between 12 to 15 pallets along the length of the conveyor.
Fed-Ex and UPS always hiring “package handlers” ...just think of it as getting paid for free 4 hour intensive exercise...good luck if you last a week.