We doing documentaries, yeah?

https://en.wikipedia.org/wiki/Lost_in_La_Mancha

https://en.wikipedia.org/wiki/Jodorowsky's_Dune

A fictional movie set during the making of a famous movie: https://en.wikipedia.org/wiki/Shadow_of_the_Vampire

BMI “works” for populations. It was originally designed and characterized to measure populations, and so it’s the perfect thing to compare massive populations, like states. The majority of people are adequately characterized by BMI, just as they are by waist circumference measures. The “outliers” are vastly more likely to pipe up online.