Not every batter is a threat, but they are using aluminum bats, and what is the comparison between college offense versus MLB offense? In the rah-rah environment of college sports, along with having scouts watch your every move, are these guys really just cruising along with nominal effort against their weaker opponents? You also have an issue where the coaching may not be as good in the "monitoring mechanical consistency" aspect of the game, and they have little-to-no interest in the long-term well-being of those pitchers. The context is different, but not necessarily better.