By “the word of God,” you mean the Bible?
I think I’m starting to sound like a one-trick pony. The Word of God is Jesus. So says the Bible.
Is the Bible trustworthy? Yes, although different people mean different things by that.
I’m not sure that Andy is dismissing the Old Testament outright. He uses the word “unhitch.” I don’t want put words in his mouth, but I would understand that to mean that it is New Testament teaching the “drives us” or “leads us,” rather than the Old Testament teaching. So it shouldn’t be discarded. But it doesn’t lead.