Slamming the slide forward with out a round is hard on the sear/ hammer engagement and really hard on a 1911 with a trigger job. It also is hard on the frame, slide, barrel and barrel link. When the 1911 strips a round from the magazine it slows the action down enough to prevent excessive force on those parts when the gun goes into battery.
Gun Mechanic
If you say so but I still have a hard time believing this is any harder on a gun than actually shooting it.