Yes, I'm not saying positional scarcity is not important, it is. But it is not so important that you should pass up a player of Vlad or Bonds' caliber simply because he plays a deep position, draft-wise. You have to draft the best player available with positional scarcity in mind, but you can't make all of your decisions based on this one strategy alone. You will potentially miss out on some great players trying to fill a weak position, when you could have gotten the great player and a slightly weaker player at the other position. In the first three rounds, when in doubt, take the stud, not the best player at a weak position (unless of course that player happen to be ARod or Soriano, then you get the stud and the best player at the same time).
I'd kill for a Nobel Peace Prize.