Hyper,
Well, first of all, remember it is only an hour long.
The simple fact of the matter is, people love woo and the documentary team need their commission. Gage supplies that woo, but gets shown up when he comically states that explosives must have been planted some time in the 80's, before cutting back to the demolition expert looking bemused.
Given the trailers, I'd say this was designed at the 'Hey, what about that building? I reckon it was a conspiracy' kind of person. That much was clear. The documentary needs to lull you into a false sense of security, confirming your emotionally satisfying beliefs before picking under the fingernails at some of their major flaws.
Examples: The media makes mistakes, they are not nearly as slick as they present themselves.
The amount of explosives it takes to bring down a tower, shown in video and described by experts.
Nigro, reality V fantasy
The general impression it will give is that 'the world is complicated' and that silent explosives and infalible media simply do not exist.
The real world contains far more 'ums' and 'ers' than the movie script allows, if any. That was what the documentary achieved, and that is what some people will walk away with.
People like Dylan Avery will watch this and be completely unaffected. But remember, he was someone who is so utterly delusional that he spun an alternate reality where the South Park episode was supportive of his ventures in inanity.
BTW, was no-one else hooked on the tennis? It was Avery blabbering away or the last set of a three-hour game in which Federer came back from two sets behind, so I knew where my priorities lay..