Referencing Judges 1:19 - “And the Lord was with Judah; and he drave out the inhabitants of the mountain; but could not drive out the inhabitants of the valley, because they had chariots of iron.”
And Chrysomallon squamiferum, “the only known extant animal that incorporates iron sulfide into its skeleton (into both its sclerites and into its shell as an exoskeleton)”.
Devils advocate answer - not my view
It reduces to whether or not one has faith that there is a (Jewish/Christian) god that wants to make their views known. If one believes that, it’s reasonable to believe such a god preserved the act of inspiring writers in such a way that their message is intelligible and trustworthy, man’s sinfulness notwithstanding. Else why would god entrust the spreading of the gospel to faulty mankind at all? He might as well broadcast it from the sky and sidestep sinful mankind altogether. But the whole point of the gospel is that god partners with mankind and makes what they do good and holy through the holy spirit. Writing gods “truths” in the bible writings falls into this category.
This was the view of the early (second century) church. They maintained that they were passed the knowledge of Christ mouth to mouth from first witnesses and that god helped them preserve that knowledge through writings that make up the new testament.