He isn't willing to tell us the true story. If God is willing but unable, He is impotent and thus not God. I don't accept that either our concept of history or our understanding of how the cosmos works are applicable to the message God was addressing to us in the scriptural account. Just as we must take a leap of faith in applying the rules of logic and science, so we must take a leap of faith if we are going to believe God's message to us. It is only because I believe in the resurrection of God's Messiah, that I accept the rest.
Historical veracity is important to the claim of divine inspiration.
Historical veracity is important for my accepting a historian interpretation of the events of the Battle of New Oleans, but not my belief in the resurrection, creation, or anything else in scripture. My faith in Scriptural statements are based on my belief that God is trustworthy. Not on the interpretations of a historian, geologist, or archeologist. It's not the historical inaccuracy of the Book of Morman that I see as the problem, it is the incompatibility of the Morman Christ with the Messiah of the Old Testament and the Christ of the New which is the problem. I don't deny that most leaps people take are into the abyss.