Kevin Willmorth has a long and interesting article on his blog in which he argues for the recognition of professional lighting designers, and what a professional lighting designer is and is not.  The post echoes Chapter 1 of Designing With Light, and many of the things I've written in the book’s blog, including promoting the lighting design profession, the value of professional lighting design, the need for projects to use a professional lighting designer (here, here and here), and  those other than professional lighting designers making design decisions, among other topics.  I don't have much to add to Kevin's post, except to say that it's well worth reading.