(learning maneuvers like drifting slowly to the left), firearms use (how to miss Care Bears at close range), discipline and alertness (bitching about drills while a geriatric desert hermit deactivates your space station's tractor beam 30 feet away), intimidation (practicing saying "you Rebel scum!" repeatedly until you get just the right tone and obvious contempt), and how to handle death by crushed windpipe gracefully (in case you're assigned to Lord Vader)

You forgot the Stormtroopers' dedicated training on how to hit your head on a bulkhead.