Why aren’t most mission statements of legal groups virtually identical?

What law department does not aspire to be world-class, to deliver cost-effective services, to be viewed as one with their internal clients, to foster collegiality and to boast the best and brightest lawyers? What departmental mission would not boast of teamwork, creativity and deep knowledge of the business?

In other words, why are not most law department mission statements virtually carbon copies of each other – at least as far as the concepts go? The words, bullets, formatting, and lamination may vary, but underneath do not all law departments that articulate their ambitions strive for the same values? (See my post Dec. 7, 2005 on various aspects of mission statements and references cited.).