I've read many of those books (non canon) scriptures. Book of Enoch, Apocryphon of John, etc.
To me, they seem just as inerrant and infallible as the canon scriptures if I treat them with the same regard as canon scriptures (without scrutiny and assuming they are infallible).
That is an emotional response to those books, not a scholarly response. There are good reasons why they are not Scripture. When you test them against what the Scriptures say and when you test them against the historical manuscript witness, it comes very clear why they are not infallible and inerrant, and why do not stand up to scholarly scrutiny. They have historical value, but no theological value.
For one thing, the Bible's 66 books are centered around ONE message, the redemption of mankind, and the kingdom agenda of restoring man back to God through Jesus Christ. That message is NOT contained in the texts outside the 66 books of the Christian Bible.
They are not historically accurate. One of the books of the apocrypha, for example has Nebuchadnezzar as the King of Syria, which is historically false, and that means it is not inerrant. Other examples could be given. The book of Tobit teaches salvation through works (alms).
Nothing in books like the Apocrypha contain anything that supports the biblical message of salvation by grace through faith that permeates both Old and New Testament, no types and shadows of Christ, nothing like what is in the true Bible.
The New Testament enjoys a manuscript witness of 25,000 Greek manuscripts that range from the 2nd century AD to the 5th century AD. They agree 100% at all possible points of comparison. That 25,000 includes 5,000 primary manuscripts of the NT in Greek and 20,000 Greek quotations of the NT. If we lost the 5,000 manuscripts, we could reproduce the entire NT from just the Greek quotations with the exception of about 7 verses. No other ancient manuscript enjoys the level of textual witness. There is no disagreement between Greek NT manuscripts from dating from the 2nd century and those that date from the 5th century. There is perfect agreement.
That being said, there are 150,000 variants in the text, but those do not affect the inerrancy of the text, as inerrancy only applies to the substance of the historical core of the claims of Scripture. Most variants amount to thinks like misspelled words, or minor scribal errors, or word reversals like Christ Jesus vs. Jesus Christ.
Nothing like that can be said for any ancient documents outside of the 66 books of the Bible.
