because we won't let it. By we, I mean you. By you, I mean your brain and heart. Yes your brain and heart are constantly fighting the world. The world will tell you things implicitly and your brain and heart strive to explicitly solve them. The implicit worldly tellings are challenging situations, obstacles and looming tragedies. Regardless of shape and size, these happen to us everyday. Then BOOM, the shot heard around the world gets fired. Your mind and heart start to make judgments around what they should do or not do. You sit there and ponder all day and all night and think... what you don't realize is that you are actually fighting. You create strategies and scenarios, much like arise in wars, and develop tactical moves to surmount these life situation. When it fails - fear, anger, anxiety infiltrate you much like an enemy. Happiness, love, fulfillment were apart of the strategy but got lost in the individual battles. Now, you are screwed. The enemy gets closer and closer and the war that looked like an easy feat in the beginning is now an epic fail. Your diet falls away, you can't sleep, lose your will to exercise and have headaches. All is lost.
Want to know the biggest disappointment? It never had to happen in the first place.