So, the problem is if there are other skills that are really low. For instance, a player with high driving (17-20) and very poor inside shot (1-3) will often be able to drive to the basket and will try to score, but because of bad IS he will miss many of those attempts.
But why blame driving if all other skills are dismal?
Sorry, I do agree with you on that, I wasn't clear. It is true that training driving will never make your player worse. However, it takes possessions away from other members of the team. I've noticed that players with high DR will take more shots than those who don't. So in the scenario where we're playing Player A 15 DR, 1 IS, 1 JS, 1 JR, along with a team full of other decent players, I'd argue it would be better to replace Player A with Player B who has 1 DR, 1 IS, 1 JS, 1 JR; Player B exists and is, of course, a liability for the team, but he won't be taking as many shots away from the other players.