2 Peter 1:21 is another proof text for the doctrine of inerrancy.
The term inspiration explains the process by which God communicated His message through human beings into the written words found in the Bible without any error. How could imperfect men be expected to produce a perfect Bible? skeptics often ask. Peter answers that question: For no prophecy was ever made by an act of human will, but men moved by the Holy Spirit spoke from God (2 Peter 1:21).
https://ptv.org/devotional/the-bible-is … -inerrant/
[2Pe 1:20-21 KJV] 20 Knowing this first, that no prophecy of the scripture is of any private interpretation. 21 For the prophecy came not in old time by the will of man: but holy men of God spake [as they were] moved by the Holy Ghost.It’s a bit of a stretch to claim this passage means that every single word in the Bible is inerrant. First off, it does not explicitly say this. Also, even if prophets spoke the direct words of God, it doesn’t necessarily mean that refers to every written word in the Old Testament (or New Testament). We have OT prophetic books and we have non-prophetic books. The only book in the NT that claims to be prophetic is Revelation. Also, like 2 Tim 3:16, the purpose of the passage is not to make a claim on the nature of scripture, but rather how it should be applied.
[2Pe 1:19 KJV] 19 We have also a more sure word of prophecy; whereunto ye do well that ye take heed, as unto a light that shineth in a dark place, until the day dawn, and the day star arise in your hearts:https://debatingchristianity.com/forum/viewtopic.php?p=986363#p986363