Hockey is a sport of extreme fluidity, of constant movement by a dozen players making in-the-moment decisions that interact -dynamically with each other.
Baseball is a sport of chronological, singular events, hundreds of which combine to complete a game.
The latter is enormously more quantifiable, and the Cubs, for instance, have mastered the systems that most accurately quantify it and use that information for a supposed competitive advantage. But so has nearly every other MLB team, diminishing the advantage.
That’s not the case in the NHL, where some analytics have taken root over the past decade but not nearly to the same degree they have in baseball.