All stories I've read about Joseph Smith's finding of the golden tablets have him finding them alone. You produce a document about eleven witnesses but we know they weren't there at the time of the finding and if you just read that document it's highly doubtful that any of them truly saw the tablets anyway.
I honestly believe (pun intended) that Mormonism alongside scientology is the worst religiosity has to offer. OTOH it is like saying that gonorrhea is the best of the STDs (thanks Jeremy Clarkson).
That aside you will not accept the eleven witnesses to vouch for Joseph Smith but will accept the Mark, Matthew, Luke and John even though they were not eyewutnesses and chronologically even further apart than the Smiths witnesses. Double standards?
How about Moses writing about Genesis when even in the context of the mythology millenia had passed from the events he "told" about. Moses also wrote about his own funeral