The last time the team went all in on prospects it was Rizzo that had already established himself and then a legitimate handful of top 7 draft picks.
Going in with guys like Kris Bryant, Javier Baez, Addison Russell, and Anthony Rizzo who developed into a 5 WAR player 2 years before 2016 and inserting Contreras into a catching rotation that included David Ross and Miguel Montero, is a little bit different than giving the keys to a bunch of mid grade prospects with average MLB projections.