In a nutshell, that separate contributions areas (support, doc, suggestions, spamfighting, TOS, coding, cookie baking, pornwriting, or whatever) don't talk to each other and coordinate/hash out stuff with each other, not even at the admin/community leaders level. (Ask rah if you need elaboration. I know I ranted to her about that at least once.) The image is that of parallel stovepipes that block sideways communication.