Just think about it for a moment ...
He retired from baseball as a player back in 2009 and went to work as a broadcaster. He had never managed a single baseball game at any level in his life -- and never coached even so much as a single inning in baseball -- and here he was being hired to perhaps the most challenging on-field coaching/managerial position in any North American sport.
He's a smart guy and he knows his way around a baseball field for sure, but you can't tell me he has any real decision-making capabilities at all.
I’m thinking Aaron Boone is a unique case, and probably committed to using computer stats in his interview.
For the most part the skipper still makes the call. He may ask for data, and he may ask opinions from his other coaches, but he makes the call.