(disclaimer: i have extremely thin knowledge regarding music and have trouble explaining why i like something besides the Vibes™️)
and i really love how from band to band it's going to be used differently with dramatic effect: as pure contrast, as balance or as "relief" from the wall of sound aspect, to mark a change of "speaker" or narrator or even as a change of tone from the "speaker" or narrator. personally if i imagine some of my favourite tracks using this as instead being pure growls or pure cleans they immediately lose a lot of depth and appeal.
some examples below: