With respect, you’re misunderstanding the point of that drawing.
The film negative that passes through the camera has a ratio of 1.33:1. That’s just the physical shape of the film. It was always intended to be exhibited theatrically at 1.85:1, but there is no film that comes specifically at...
Kubrick’s (and by extension, Vitali’s) comments of aspect ratio have always been made in the context of their time and the technology available at the time. It’s disingenuous to say that because Kubrick felt 4x3 was the best presentation of spherically shot films on home video in NTSC resolution...
1.85:1 is the original aspect ratio for Full Metal Jacket. As with the overwhelming majority of films shot with spherical lenses, the entire 1.33:1 frame was exposed and protected, but with the intention of being matted to 1.85:1 for projection. Because Kubrick understood that his films would be...