This documentary can't even get it right about which eye Ford lost. They don't know that John Wayne got his big break from Raoul Walsh in 1930 but because The Big Trail" was such a box office flop (personally I liked it) Wayne ended up playing endless B westerns. The documentary ignores Ford's long term relationship with Walter Wanger (the guy who backed Ford on Stagecoach and other films). Apparently they don't know that Ford learned about westerns working with Thomas Ince, the man who was called the "Father of the Western". And I could go on and on. John Ford was one of the best directors ever. He deserves better.
