Using that level of logic, players who have had outstanding careers but not so great World Cups or ICC sanctioned tournaments should have been considered during the drafting stage then. Someone like Allan Border has not even been picked by a team. I agree with your first point however. But considering the relatively small sample size on offer, it's not much of a valid data point. Unless you are a Miandad or a Tendulkar, you are obviously only going to see players tested in a few conditions in these tournaments.
People seem to be forgetting what exactly is being given weight-age to in these drafts. I don't understand why that is so hard to understand, especially when it is so easily accepted and followed in the football drafts.