Most of us here can drive.
But how many of us can drive a car with such precision that they would be qualified to be race car driver quality, stunt driver quality, or even defensive driving level quality.
Just because everybody can drive, doesn't mean you can handle a vehicle or vessel to it's maximum potential.
There are lots of layers to driving, most people only know the surface layers of it.
The same can be applied to the helmsman.
A dedicated helmsman should be able to fly the shuttle or starship in ways that no average pilot could do.