Whether teams should foul or defend when leading by three points late is contextual. Who has the ball? Where on the court is he? How much time is left? How good is the offensive team at 3-pointers?
Instead, the Cavaliers defended, and Carroll made the game-tying 3-pointer to force a third time. Brooklyn then won,
Of course, other context matters, too. Cleveland is tanking, and the loss improved draft position.