A: Smart people don't play dumb. They simply don't show up on anyone's radar. They are the people behind the scenes whose names you never hear and whose faces you never see.
This is filler to make my answer longer because everyone knows that a short answer cannot be a helpful answer:
There was a famous interview of Anwar Sadat by Barbara Walters in which she presented him with a question that no one could remember, much less answer. It must have taken her two full minutes to set up and pose this long, long, convoluted, multiple-choice question to which Sadat replied, "No." Not helpful at all, unless you consider it an answer in the sense of a response to the question rather than a solution to some sort of quiz or something.
Some questions warrant more of a response than an answer. Some warrant a response instead of an answer. Some warrant neither. If you don't get a four-page essay in answer to your question, maybe it didn't warrant it. Maybe it's not so much the quality of the response as the quality of the question. Maybe you asked a dumb question (and, yes, Virginia, there is such a thing).