Whether Mormonism is true or false is a matter of opinion, just like the belief that Jesus is God and the Jews didn't recognize him is a matter of opinion to.They say the plates were returned to the angel Moroni, but we still have the Dead Sea Scrolls because true Christianity is not a false religion built on lies, that cant stand up to examination.
If its not from God, it can only be inspired by Satan.
Any way, the dead sea scrolls are copies of other copies. The Dead sea scrolls lay buried for some 1800 years before being found that would match other ancient writings in the OT.
So the BOM has only been around for shy of 200 years. And you're pretty confident that nothing hidden in the ground on the Americas will never be found that might validate one or more things in the BOM? What, do you have a seer stone like Smith to make that judgement?:)