The movie is more or less scored wall to wall. But this scene gives chills by using no music.
It’s in principal the same as a movie with very little music, where a scene with music makes a big difference. It’s the contrast.
How much music a movie “needs” can differ greatly. Both STAR WARS (1977) and CHINATOWN (1974) are two very well scored movies, with exactly the right amount of music.
STAR WARS has close to 90 minutes of music in the movie, whereas CHINATOWN comes out at less than half an hour or so. And CHINATOWN is the longer movie. Yet both movies have a perfectly fitting score that has just the “right” amount of music.
Movies have different requirements, not all movies need the same amount music.