Not much novelty in this concept is there? Tennis is easy. You can hit a ball with a racquet pretty easily, gettin it in is a little more difficult. But when

Not much novelty in this concept is there? Tennis is easy. You can hit a ball with a racquet pretty easily, gettin it in is a little more difficult. But when you get to a much higher level, there is spin, footwork, eye hand coordination, endurance, wind, returning 130MPH serves -- hard stuff. At pro level, if you hit a ball with at an angle just a few degrees off, the opponent can use that as an easy winning shot. Things are easy and hard with different circumstances. I think this is a pretty generic statement that applies to many things.