It is amazing that anyone still debates the setting of the Book of Mormon. The issue is a simple binary; i.e., did Joseph and Oliver tell the truth, or did they not?
People can believe whatever they want. They can choose to believe what they said, or to disbelieve what they said.
If Joseph and Oliver did not tell the truth, does it make any difference what anyone else thinks?
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Joseph and Oliver taught the New York Cumorah in plainness and simplicity.
The principal complaint by the disbelievers is that Joseph did not leave enough of a record to satisfy them. Joseph helped Oliver write Letter VII. Joseph had Letter VII copied into his own history. Joseph had it republished multiple times, including in the Times and Seasons where he also published his letter to the Saints explaining he learned about Cumorah before he even got the plates (D&C 128:20).
But none of that is sufficient if you don't want to believe what they taught.
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Speaking of simplicity, the most popular post on my setting blog is titled "Simplicity."
https://www.bookofmormoncentralamerica.com/2016/05/simplicity.html
In that post, we observed that the historical facts are unambiguous and we contrasted two sets of assumptions about those facts:
1. the simple, plain assumptions that Joseph and Oliver told the truth about the origin and setting of the Book of Mormon
against
2. the chain of conspiratorial assumptions M2Cers must make to persuade Latter-day Saints to reject what Joseph and Oliver taught.
The word "simplicity" is used just once in latter-day scripture:
And for this cause, that men might be made partakers of the glories which were to be revealed, the Lord sent forth the fulness of his gospel, his everlasting covenant, reasoning in plainness and simplicity—
(Doctrine and Covenants 133:57)
Plainness and simplicity.
Together.
Then...
Reasoning in plainness and simplicity.
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Paul spoke about plainness of speech:
Seeing then that we have such hope, we use great plainness of speech: (2 Corinthians 3:12)
I shall speak unto you plainly, according to the plainness of my prophesying.
For my soul delighteth in plainness; for after this manner doth the Lord God work among the children of men. For the Lord God giveth light unto the understanding; for he speaketh unto men according to their language, unto their understanding. (2 Nephi 31:2–3)
And now I, Nephi, cannot say more; the Spirit stoppeth mine utterance, and I am left to mourn because of the unbelief, and the wickedness, and the ignorance, and the stiffneckedness of men; for they will not search knowledge, nor understand great knowledge, when it is given unto them in plainness, even as plain as word can be. (2 Nephi 32:7)
