I think you miss the point. ftD is proposing a rational God who wouldn't leave us all at the whim of scholars to determine what is and isn't the word of God. I think he believes that God has given us his perfect word in our own language.
In other words, ftD might say that God gives each language its own perfect translation of His Word, and that the KJV is ours in English.
It is a matter of faith (and of the bad character and bad judgement and broken humanity of scholars)
Good question.
I think you have to look at the history to see why.
The Bible that had won the average persons hearts before the King James was the Geneva.
It took some 50 years before the King James supplanted it, but it did!
Thus, even the Reformed Church gradually moved away from their own excellent translation and to the King James.
They even printed King James with the Geneva notes in them.
We cannot discount the spiritual when we are talking about God's words.
The other TR versions were greatly used by God, but the King James is the Crown Jewel