There would have been no reason for preserving the record unless it was God's intention to preserve a text for the posterity of the church and mankind. Once you conclude that we do not have a pure text that was supernaturally and providentially preserved by God's oversight, then you have a text that is not trustworthy and has become mauled by intellectuals and Gnostics through the ages. We thus further conclude that if this is the case then we have NO absolute authority in the Word of God and that by these multiplied Greek texts and numberless English translations a man may choose his beliefs from those books with great diversity. But if there is indeed an original preserved record was kept true and reliable, you have established the great preserving principle of singular authority essential to government and the order of things. Without the single preserved text you have just that - confusion.
Today there is confusion and debate among the textual critics themselves.
They sometimes cannot even follow the preacher reading his text. That thou mightest know the certainty of those things, wherein thou hast been instructed. And there was delivered unto Him the book of the prophet Esaias. And when He had opened the book, He found the place where it was written. Jesus quoted from Isaiah 740 years after Isaiah wrote the text He quoted.