The best baseball players are typically well-rounded, especially these days. You may have been able to get away with being a one-tool guy years ago, but with advanced analytics and the amount of available data, it's difficult to sneak by with an incomplete profile.
For prospects, failing to flesh out the other aspects of their abilities is often a major reason behind falling short of a successful major league career. Since being signed as an international free agent in 2022, Lazaro Montes has been known for one thing: his power. Because his contact and swing decisions didn't quite match up to his natural slugging abilities, he was initially seen as a high-risk prospect, but he has been cutting down on the strikeouts over time.