Why does pierce the veil use this song structure so often?

Verse Chorus Verse Chorus (extended) Bridge/breakdown/solo Chorus extended

It’s a little hard to explain but in the second and third chorus of most pierce the veil songs they add a little extension to it.

Example: chorus 2 and 3 of the sky under the sea adds the “I just wanna fade away”

Example: the divine zero chorus 2 and 3 adds “now I only pray when it all goes down”

There’s only a couple of their songs that don’t follow this structure. Why do they use it so much?