Did you ever notice that whenever we see photographs of film directors, we always see them frame a shot with their hands? Not sure if that is a tick, or maybe that’s what photographers think film directors do all day. In the past, the stereotype of a director (ironically, in movies) was of someone with a megaphone wearing riding boots, a cap, and breeches. That’s now gone. It’s been replaced with the image of the film director as a mime.
The importance of hands in filmmaking? There is none.