If you post, "Those fools at WotC! They are stupid, arrogant, and quite possibly deceitful!" well, you are quite unfairly and ignorantly bashing WotC, something we also see quite often here on ENWorld, in particular on this thread.
I'd say that if WotC, as posted above, do not even follow the advice about needing plot outlines in their own product (El Mahdi pointed this out, p. 141 DMG, Campaign Outline), then it's neither unfair nor ignorant to call that stupid, arrogant, and possibly deceitful, depending on their motives.
Preaching water and drinking wine and all.