Amen! I came across CS and IA Unite Already, Will Ya! just shortly after I came across a job posting from Smart Design where they emphasized they were looking for User Experience designers who were not the Boxes and Arrows types. User Experience problems need to be solved as a system and, although I can understand why areas of specialization in Content Strategy, IA, SEO, IxD and prototyping/dev evolved, it's important to acknowledge that they're simply subsets of user experience and are collectively the responsibility of the UX lead. It's one thing to understand theory--it's another to put it into practice.
Content Strategy is not Copywriting. Design is not Window Dressing. Information Architecture is not Boxes and Arrows.