Cinematographers almost always want part of the image blurred - an entire image in sharp focus would make it difficult to perceive depth and would take away the ability to direct the gaze of the audience.
In an anamorphic lens the image is squeezed, so the effective aperture is squeezed... well, in most of them. There are anamorphic lenses with the anamorphic part behind the iris, and for those you don't get the oval shaped oof highlights.