Because they bring different perspectives and different experiences to the table. You may be content with consuming the same meal/reading the same book/wearing the same clothes/thinking the same thoughts every day every week every month every year for your entire life. I am not. I LIKE DIVERSITY! I am a huge fan of it. I think homogeneity is inadequate because it lacks more than it contributes. So we disagree totally. SO WHAT? Right? SO WHAT? Thank you for your reply.