This is certainly true in some sense! (And kind of the point.) Reproducing reality as exactly as possible is one use case for video, but typically for cinema w

This is certainly true in some sense! (And kind of the point.) Reproducing reality as exactly as possible is one use case for video, but typically for cinema we want to provide a subjective artistic interpretation of the imagery. But yes, the look of film is hardly the only valid way to present a movie. There are lots of interesting looks that can be achieved that don't look like film at all. Film emulation is an artistic tool, like other tools that bring the look of a movie further away from reality and toward some thematic goal (depth of field effects, framing, camera movement, aspect ratio, color grading, music, not being 3D, etc.) Filmbox is meant to be a particular interpretation of camera data, one rooted in the history of motion picture imaging, available for artists to use as appropriate.