For the modern human, living in a world clogged with people, living a truly unique life is impossible. Therefore, one must retain the dreamlike youthful nature at all costs. There is no quicker way to erode this gift given to us all at birth than to communicate everything explicitly.
Dreamers are not competitive by nature - they may feel competitive, but if they play by the rules of the established competitive business game, they are too disingaged and nonverbal to advance rapidly. The dreamer would therefore be best suited to start his own company or engage in more technical pursuits