The points made in the article are only valid if one's goal is to make propaganda or make work to please the stated goals of a funder. The idea that documentaries should merelybe tools to push an agenda is a maddening one.
"Filmmakers who ignore analysis in a misguided fealty to some conception of artistic integrity are, consciously or unconsciously, placing their aesthetics above the issues they care about."
Even if I believe in an idea I hate propaganda. I plead guilty to have a fealty for ideas over arguments. It's a good idea to click through and look at the data about "Waiting for Superman's" effectiveness at pushing an agenda. Sounds like it was, but whose agenda was it? Bill Gates, Eli Broad, and others who have never spent any time in public schools.
Data can be useful but it can also be dangerous if we don't look at the complexity behind it.