Passing trains Driving, so that's the way good drivers get their open looks inside.
OD and Handling really does make little sense. That ID doesn't train OD a little is more surprising to me.
JR->JS does make some sense, though, since when training their Range, players take lots of jumpers, even if they don't hit them regularly - that's why there are separate skills for range and JS, or Handling and Driving... they are not the same, but training the one will help improving a little in the other.