I'm not suggesting that the players have to understand it, just that they have to buy into it. If they don't buy into it, it's likely not going to work.
I think that a lot of the managers themselves don't buy into the analytics, and therefore don't use much of the information given to them by the FOs, and therefore didn't see the need to communicate this information to the players. I really think that there is a disconnect between the analytically minded FOs and the traditionally minded managers, though I believe the trend is changing.
The Red Sox have a special coach, Ramone Vazquez, whose job it is to make that connection, and to relay such information to the players in a way that it's not threatening. My understanding is that Cora specifically asked for this coaching position to be added.