Anyone who has ever worked with victims of various tragedies will know that there is a great deal of difference between what happened and how the person responds to what happened.
Sure, you can blame the advertisements, the TV shows and the greedy bankers if you want, but it still comes down to who drank the Kool-Aid, not who made the Kool-Aid.
The underlying premise to the value of holding a positive focus on a positive outcome contains two basic fundamentals: (1) energy follows thought and (2) the universe rewards action, not thought.
Indeed, many of the negativists of the world seem to engage in an insidious game, using their intellect, but not their intelligence, to argue against the potential for positive focus or improvement.