Contrast can create more impressions
not all things in life has to be some grandiose moments
not all moments of a critically acclaimed masterpiece of a film is a deliberate decision
not all tracks of an album has to be great to be a classic
not all parts of a song has to be bombastic
not all parts of a game has to be epic
not all parts of the picture has to be attention-grabbing
contrasts give breathing room for people to take all of the stuff we intend to
in other words, when everything stands out, nothing will
real-life examples
most of the memorable tracks from Touhou are from the final bosses as ZUN makes the best track he can make; it makes his game more memorable by building up to the final theme
badly-designed advertisements will try to make everything stands out (lots of examples in the wild especially if you go to your local events)