Situational Awareness is a myth? The point of training to identify potential threats around you is just that....not to 'look' around you for the purpose of fulfilling an exercise. When we were taught to look both ways before crossing the street as children......you didn't just go through the motions, as you infer, you actually paid attention.
Pay attention. Trust your instincts. Learn to recognize threats and potential threats. Train. Other than that, life goes on.