A recurring error is to construct an entire background story as a speculative possibility and then speak of it as an established historical fact. This confuses imaginative reconstruction with sound exegesis.
Historical background is needed when the expression cannot be understood without it or when a reliable report clarifies the meaning. Where language and context already suffice, a proposed story cannot be asserted with unwarranted confidence.
Correction: distinguish possibility, evidence, and the purpose of the Qur’anic narrative. A story that seems plausible is not thereby verified.