From Paul Campos’ Don’t Go to Law School (Unless):

It’s not merely that it’s common for a law professor to have never tried a case, or negotiated a deal, or drafted a real-life version of the sorts of documents he’s discussing in a Contracts, or Corporations, or Wills and Trusts class – it’s that legal academics almost never know anything about the business side of legal practice. The two most important practical skills that any lawyer working in private practice must possess are the ability to acquire clients, and to get them to pay their bills, which happen to be two things that most legal academics have never done in their lives.

Rule of thumb: The more you know about any specific kind of “vocational” education, the less vocational it looks.