Are you self-aware enough to admit that you are doing the exact same thing? You have decided that a book you have not read is false, and so you accept without question evidence of that falsehood. Any evidence that supports the Mormon narrative you dismiss, without examining it, as the work of apologists. Yet, if as you say, atheists, other Christians, Muslims, etc., become convinced of the Book of Mormon, would they not then become apologists, and in your view lose all credibility? What source could convince you, then?
A false equivalency, the bible contains many historical claims you can believe without being a christian. Many atheists believe there is a historical Jesus who was crucified, or that some of the historical events did happen. They don't believe Jesus is the son of God.
To believe Joseph Smith found some ancient gold plates and a medieval sword at a site in the US I wouldn't have to believe they were the work of a prophet, or he saw an angel. I could simply believe he was a religious fanatic who stumbled across an archaeological site. The Book of Abraham could exist,, be a proper translation, and simply be some ancient belief.
There are lots of ancient religious sects no one believes, a pre-viking European migration involving another religious sect doesn't mean we would believe that religion either. So atheists could believe those claims from the Book of Mormon without believing in the religion itself, none do which suggests that the evidence is quite poor.
have a couple of missionaries come by your house with a Book of Mormon, read it, and try the experiment contained in its very own pages. (What have you got to lose?) If you then learn that the book is its own best evidence, then it follows that Joseph Smith was the prophet he claims to be, because good fruit does not come from a poisoned tree. Everything else is just window dressing.
But if there is evidence besides the Book of Mormon then the Book of Mormon shouldn't be necessary.