When I was a ***sola scriptura ** * fundamentalist protestant, I was indoctrinated not only with the notion that the Bible was the *sole authority * for Christian living and belief (an idea nowhere to be found in the Bible) - but inculcated also with the doctrine of **“verbal, plenary inspiration” ** of Scripture (that is, that the Bible is divinely inspired and inerrant,
word for word, every word - even down to the part on the inside of the front cover, where it says, "genuine cowhide

).
Now, the fact that the textual variants do not substantially affect the integrity of
doctrine is not quite relevant to this notion. For if any notable textual discrepancies exist - and there are thousands - then **we cannot know with the certainty of faith exactly which words ** (word for word and every word) among the various readings are divinely inspired and inerrant. We may be able to come to a
relative moral certainty, through the science of textual criticism, regarding which of the variant readings reflects the original text, but we can never arrive at the absolute certainty which divine faith requires.
It is thus clear that Christ the Lord never meant for the original text of the New Testament to be somehow miraculously preserved from error in the process of textual transmission, or for scribes down through the ages to enjoy the charism of infallibility. But He did establish an Apostolic Catholic Teaching Authority, unfailingly to guard, protect, and proclaim His Word until He should come again in glory. For it is no writing, but rather the One True Church itself, which He personally established at the price of His blood - Mother and Teacher of all churches, built upon Peter and his succesors until the end of time, endowed with the fulness both of divine truth and the means of holiness and salvation - which he gave unto us as the “pillar and foundation of the truth” (I Tim. 3:15).
If one is to believe in the notion of verbal plenary inspiration that underpins the doctrine of
sola sciptura, then one must decide - and on what divine authority? - exactly which of the ancient readings, and exactly which of the ancient manuscripts, is the divinely inspired, inerrant Word of God. They cannot all be.
Let’s take the most ancient for a starting point: which reflects the “real” Bible? Papyrus 45, 46, 47, 66, 72, 74, or 75; Greek Codex Sinaiticus, Alexandrinus, Vaticanus, Ephraemi, or Bezae; the Curetonian, Sinaitic, or Peshitta Syriac; Latin Codex Palatinus, Bobbiensis, Vercellensis, Veronensis, Bezae, or the Vulgate; the Fayyumic or Sub-Achminic Coptic; the Gothic Codex Argenteus; etc., etc. (not to mention the citations found amongst the writings of the Early Church Fathers, from which nearly the entire NT corpus can be reconstructed)??? Surely the Lord never intended us to have to be textual scientists in order to know what His Word is. He gave us the living Magisterium of the Catholic Church for that.