What's an F-stop? Who cares what an F-stop is? Don't worry about the F-stop. I never did.
Who is this manic saying such things? Why, it's Robert Rodriguez, a film-maker, um, of some note. His point is that there are more important things than F-stops when you're making a movie. The same applies to making a still picture. Sure, the aperture is a thing, and it has an effect and so on. But ultimately it's usually not the thing that makes or breaks the film, or the picture.