Why do some exegetes prefer one Quranic reading over another, despite all readings being متواترة and established from the Noble Quran?

Preferring one reading over another occurs in two ways: either it leads to denying an established reading or weakening it, which is impermissible. Or, by choosing one reading and preferring it over another for a specific reason, which is practiced by scholars.

Scholars have mentioned criteria for preferring one reading, including: acknowledging the excellence of all readings, clarifying the reason for preference (such as grammar, rhetoric, or exegesis), and ensuring that the preference is not between two readings that differ in meaning, because the purpose is to multiply meanings. The seven ahruf (modes of recitation) do not contain contradictory meanings; rather, their meanings may be in agreement or close to each other. All these readings are true, and each reading with another is like one verse with another verse. It is obligatory to believe in all of them and follow what they contain. Thus, the multiplicity of readings allows for the benefit of multiple meanings, similar to the multiplicity of Quranic verses, and resembles the repetition of Quranic stories in clarifying new meanings.