Nazm (Coherence) And Shan E Nuzul (Background Of An Ayah)
You’re on-spot here and I agree with both your premise and its conclusion. Shan-e-Nazul or the hijri when a particular verse/surah was revealed is of least importance. However, the stage of Sarguzisht-e-Inzaar at which that particular Surah has been revealed is of critical importance both for the coherence of Quran and in understanding the implication of the verses. And all of this can be extracted from the Quran itself, we do not have to refer to any external source to determine that.