Any practice can be made an art however. In this case, the best drivers are seperated by only tiny fragments of a second because as it seem simpler to just turn around 4 corners, the skill becomes how EXACTLY precise you take those four corners. Saying NASCAR drivers are unskilled doesn't make any sense. One thing F1 does provide is a variety of different corners which means drivers generally need a broader skill base as there is much different wasy of attacking a F1 corner than a NASCAR one.