Why Can't They See?

My mom sent along the photo at right as one in a collection of absurdities.  It nicely illustrates the paradox that many before me have pointed out: if psychics can predict the future, then why can't they (a) forsee circumstances such as the one at right, (b) get rich by forseeing stock price movements or real estate values, (c) avoid accidental trauma themselves or their loved ones, (d) etc., etc.?

The few times in investigational writings when I've seen such questions raised, the replies of the psychics are such obvious claptrap that one would think nobody would buy their story.  Yet billions of people around the world persist in believing this sort of magical thinking, in the face of such abundant contrary evidence.  Why can't they see the truth in front of their faces?