I agree with the criticisms below about methodology; IQ is ultimately a measure of how good you are at those particular tests. And multiple skillsets are tested. But it is valuable when you're talking about general trends or having a concrete point of comparison (for example, a certain individual compared to the general population).
I've been decently satisfied with Culver's the once-in-a-quarter time I decide to have some fast food. Even if that is the case, I think we need less fast food overall, not better-served processed crap.
And... hate to say it, but there are a lot of people with 80-90 level IQ in the US. Many of them struggle with things like projecting forecasts, longterm planning. They are extremely vulnerable to these manipulative marketers.
Oh then you definitely should watch it! So long as you are okay with disturbing films that will stick with you.
Speaking of trivia: 'The film was disqualified from the Oscars due to too much French.'