The diversity of skills, expertise, and interest is especially useful when people of different “walks of life” can collaborate with one another. Tolerance, collegiality, dialogue. When people share ideas, the potential is much greater if their ideas are in fact different. Very simple principle, which runs through anthropology as the study of human diversity (through language, time, biology, and culture).
The problem, though, is that people from different “fields” tend not to respect one another’s work. For instance, a life scientist and a social scientist often have a hard time understanding one another because they simply don’t respect their interlocutor’s discipline. They may respect each other as human beings but they share a distrust as to the very usefulness of the other person’s field.