Yes, i completely agree with you, music plays a big role in the film. the fact that the sad, terrifying, and strange scenes of each piece of music are made for him can naturally better express the feelings of the film and the director.
I recently saw a Korean series called "Jumong" that has a very nice soundtrack. it really feels great when they fight when they lose, and when they win.
Oh, a terrifying scene without some suspenseful music would not be the same :))
And also all the other scenes that are enhanced with corresponding music make a stronger emotional reaction in us.