Peter F. Drucker in his “Managing Oneself” essay in the January 2005 Issue of Harvard Business Review,

Discover where your intellectual arrogance is causing disabling ignorance and overcome it. Far too many people—especially people with great expertise in one area—are contemptuous of knowledge in other areas or believe that being bright is a substitute for knowledge. First-rate engineers, for instance, tend to take pride in not knowing anything about people. Human beings, they believe, are much too disorderly for the good engineering mind. Human resources professionals, by contrast, often pride themselves on their ignorance of elementary accounting or of quantitative methods altogether. But taking pride in such ignorance is self-defeating. Go to work on acquiring the skills and knowledge you need to fully realize your strengths.