Why are we finding Ancient Near Eastern books resembling the Book of Mormon (Narrative of Zosimus)?

The Narrative of Zosimus is an ancient document appearing in the 1870s written in Hebrew that is dated to at least the time of Christ. It narrates the history of a religious group who left Jerusalem around the same time as Lehi in the Book of Mormon, to a new land across the sea.

John W. Welch summarizes the points in the Narrative of Zosimus which are similar to the Book of Mormon such as:

Dwelling in the desert
Being led by prayer and faith
Wandering through a dark and dreary waste
Being caught away to the bank of a river
Crossing to the other side of a river or abyss and passing through great mist
Coming to a tree whose fruit is most sweet above all
Easting and drinking from the tree which was also a fountain of living waters
Being greeted by an escort
Being interrogated as to desires
Beholding a vision of the Son of God
Keeping records on soft metal plates
Recording the history of a group of people who escaped the destruction of Jerusalem at the time of Jeremiah
Being led to a land of promise and of great abundance due to righteousness
Practising constant prayer
Living in chastity
Receiving revelations concerning the wickedness of the people of Jerusalem
And yet obtaining assurances of the mercy to be extended to the inhabitants of Jerusalem

Why are we finding other ancient documents that tell of God leading religious groups of people to a new land? Doesn’t this strengthen the case that the Book of Mormon is what it purports to be?

See:

John W. Welch – The Narrative of Zosimus and the Book of Mormon

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