There's several ways to do the sound-shock method of shattering the little bugger, one of which is to make an incision and feed in something similar to the laproscopic wand used in gall bladder surgery. Just about anything is preferable to the pain, by the time you have been passing one for a few days. But it's rather like an opera singer shattering a glass with her voice, not so much like trying to break something inside you by hitting your outside with a hammer
Oh, and that business about how they can be "easily" passed by drinking a lot of water and waiting for nature to take its course is wishful thinking. These "stones" are not always rounded and they can get lodged sideways in the tubes. All the water in the world will not expand that tube to let the thing continue on its way.