The documented variations in wording and meaning within the multiple kira'at clearly suggest that the Qur'anic text has not been perfectly preserved in a singular form, unchanged over time.
This evidence of textual differences across various readings indicates that the transmission and recitation of the Qur'an have undergone changes, leading to discrepancies in the wording and meaning of the text, as we see in the differences between Hafs and Warsh variants.
Therefore, the presence of multiple kira'at contradicts the claim of a flawlessly preserved Qur'anic text without any alterations since its original revelation.