Both the technical field and the academic field (especially the humanities) are plagued with the notion that a complex and therefore "valuable" idea also needs to be expressed in complex terms to be considered valuable. Personally I believe that there's insecurity at the core of this, writers are afraid to mention things that are obvious to some readers, or afraid to use language that is considered too "simple" for the context (the efficiency of the message is not considered at all).
When it comes to technical writing at least, nothing could be further from the truth. I think anyone who writes for a living has a responsibility to not waste the reader's time, and "get on with it" so to speak. Focus on what's important and drop the rest. Almost any sentence can be made 10% shorter, which seems insignificant until you've made the entire text 10% shorter without losing any important messaging.