Yeah well, maybe my image is biased by what I see in technology and hard science. I deal with the R&D colleagues quite a lot, and for some reason those who be a habit of "defending" their area of expertise by saying stuff like that, also defend it by not sharing information, and generally act like nervous fools trying to make their area of work as exclusive and intransparent as possible. Those guys are regarded with some disdain even by their peers in R&D. Those who use exclusive language just don't want or can't find easier words to explain complicated concepts and that's a bad thing, not a good thing, in hard sciences or engineering. Our fields of expertise are complex and difficult to understand but of we want to contribute positively to projects and the company's operations in general then we need to use clear, unambiguous and nonexclusive language to explain what we do.
I don't know how it is in the humanities - you guys produce immaterial output after all, not material output, so the language you use is part of what you produce, not just part of the explanation. But don't your concepts also profit from being explained in clear and simple language wherever possible? And complex relationships being explained in the simplest way possible? Not like the way medical doctors cloak everything they do in secret language but more like the way things are explained in a radio show, or a lecture?