Revelation came at different times and in different circumstances. At one time the concern was correcting belief, at another strengthening the Messenger and the believers, answering an objection, or laying down a ruling. The circumstances of revelation therefore matter when one examines the Qur’an’s composition.
Maqtaḍā al-ḥāl means the needs of the particular situation that make a certain form of address appropriate. This does not make the meaning arbitrary; it explains why a piece of guidance takes its particular rhetorical form.
A historical narrative may accompany moral instruction because the event clarifies the admonition. A legal command may be accompanied by its spiritual purpose. Such combinations do not reflect a faulty division of topics; they belong to the mode of purposeful discourse.