I have no idea if Girardi is smart or not. I have no idea if moves like Judge #2 or his modern BP usage in the playoffs was his idea, or mandated by the analytics group in the FO.
What I do know is the end result had the Yankees best hitter in the 2 hole, and the BP was handled nearly optimally. I also know he did a pretty good job juggling high priced players/egos throughout his tenure in NY.
No matter how that came to be, Girardi is better than Snitker or any other OBP-denier dinosaur the Braves are likely to hire.