There is no work to show. It's a mechanical problem that can be corrected. Before you go all ape, yes, there is a wide dispersion of ability in terms of accuracy, just as there is with velocity. But the limits of the body determine velocity, not accuracy. What determines accuracy is body mechanics, which is teachable. Some guys are going to learn to harness the natural movement of the ball to throw strikes better than others, but it's teachable, just like grip and pitch "shape".