It would be incorrect, albeit tempting, to say that documentary film rode the wave of “reality” obsession to its current level of popularity. If anything, documentary has succeeded, as both a critics’ darling and a profitmaker, despite the reality television craze. People enjoy reality shows because their own voyeurism happily confirms that the narrative arcs of scripted television are present in “real” life, as well. The documentary’s success as a genre, though, thrives on its…