Joseph Smith's mother would hear these fabled myths from her son when he was a teen about 17...before he had access to the alleged ability to "translate" supposed gold plates:
"During our evening conversations, Joseph would occasionally give us some of the most amusing recitals that could be imagined. He would describe the ancient inhabitants of the continent, their dress, mode of traveling, and the animals upon which they rode; their cities, their buildings, with every particular; their mode of warfare; and also their religious worship. This he would do with as much ease, seemingly, as if he had spent his whole life among them. On the twenty-second of September, 1824, Joseph again visited the place where he found the plates the year previous; and supporting at this time that the only thing required, in order to possess them until the time for their translation, was to be able to keep the commandments of God...he fully expected to carry them home with him. (Lucy Mack Smith, edited by Preston Nibley, History of Joseph Smith, p. 83, Bookcraft, Salt Lake City, 1958)
Anybody who doesn't think Smith couldn't have made up the Book of Mormon after reading this needs to invest in my swampland island I'm selling bits of in the South Pacific. (We're "reclaiming" a little bit back from the ocean one volcano burp at a time!)
I need to look at your swampland because I am one who, “DOESN’T think Smith COULDN’T have made up the Book of Mormon, or in other words I think he made it up.