In the chapter on advanced players, most instructional books discuss the “touch shots” –the lob, dropshot, drop volley, half volley, and other delicate shots. Being more of a player means having more touch or feel.
Playing competitive tennis can be stressful. And you all know that stress, beyond a certain level, makes any player perform well below her level. (I’m still waiting to hear from anyone on any subject whatsoever where excessive stress is beneficial!).