Porn is sensational, more or less by definition, but it doesn't necessarily follow that it's distinctive or central.
And even the Mensa thing—yes it strikes me as pitiful, but is it really any more ridiculous than me looking at my blog's statcounter? Even as it is, though, the film makes it clear that porn for many performers was a way out of a dilemma—or, for some, a way to compound it.
The film might have done better in illuminating this corner if it had had the elementary courage to interview black or Latino performers, and to think about race as well as class.