It provides the best of both worlds.
Film handles a wider range to lighting conditions which makes it better for location shooting.
Electronic amplification of dark areas creates noise degrading image quality. Shooting action also requires faster film to freeze motion. Equipment costs are less than a tenth of professional digital cameras. This keeps overhead down, costs which must be passed on to the client. Digital cameras must process and store data between each shot while film cameras can record images at 5 or 6 frames per second.