Quick shifters can be hard on transmissions because they kill ignition entirely for a few milliseconds. If you use it ALL THE TIME, its absolutely going to cause wear. A lot of companies have adopted it for standard shift because in all honestly, its very hard to lift up and get it into gear whilst on the throttle. However, its MUCH EASIER to push down and get it into gear when on the throttle, especially once your transmission dog's wear down.
What happens is, there are two transmission gears which need to mesh. One has holes which are just the right size for these little curved "dogs ears" to fit into. When you change gears, the selector shaft pushes the gears towards each other and the dogs fit into the holes. But the dogs themselves have sharp, hard edges on them. Over time, those edges start to wear, which makes the shifting easier and easier. Its slightly different on the Ducati transmission, both sides have dog ears on them instead of holes, but you get the picture.
So when you use reverse shift via a direct shift lever (no linkage to gum up the works) it actually works pretty well without the need for a quick shifter. It would fall right into gear the moment you pushed the lever.