I, too, would like the perfect player with no uncertainty to be available at #3. But I have the same concerns about not particularly athletic mashers, whom recently I have seen hit more of a wall once they face AA and AAA pitching, while high schoolers who are improving their body and skills facing top competition fly by them.
I really hope vaughn is a complete masher, I think he definitely is worth taking a chance on.
But people are taking at face value the idea that college competition is essentially the pros and we can just expect that type of player in the bigs, whereas the high school players are also what they are now, with no improvement.