Look, it's great when the person in charge of deciding policies is the same person doing the work, and the same in charge of selling it to whoever must be convinced. But most people work on different environments (yep, even when they own the company), and communicating, even things that appear obvious to one of the parties, is crucial to make right decisions on those other environments.

For example, if you are looking into hiring a designer, if you didn't read the article and makes the obvious decision of asking a wireframe from the biders, you just alienated everybody that could make your site great. That this is obvious for the alienated designers changes absolutely nothing.