What is the main interpretive value of studying repetition in al-Raḥmān and al-Mursalāt?

Division of Surahs into Verses, Qur’anic Rhythm, and Verse Endings

• To classify each surah as a fixed poetic metre
• To dismiss every recurrence as unnecessary
• To relate each refrain to the fresh material preceding it
• Treat the discourse following each refrain as unrelated to what precedes