Smoothness* is the glue that keeps you stuck to the road, as we used to say in HPDE motorcycle school. A wonky throttle linkage will make smoothness a more difficult aspiration to achieve.
*Being smooth does not preclude being agressive or fast with your inputs. In the proper setting very fast inputs may be required to be smooth. An old friend of mine raced in the SVRA and was voted smoothest driver multiple times. He did that in a Dekon Monza, and absolute stone axe of a car. You would not believe how fast his hands and feet were moving, while outside the car it looked so fluid arching around the turns. He wore size 11 Red Wings, too.