Ever wonder at a beautiful between the legs return in tennis, or an incredible behind the back pass in ice hockey? The sense of touch can help do that even when the athlete can't see where the racket or the stick is—they just know.
Batman exists in a grim reality and a big part of that reality is the physical toll on the human playing the part of superhero. That toll is inflicted repeatedly by the bad guys he faces and none has been front and center for the repeated toll like the Joker. Why is the Joker so hard to beat?