Doctrines of Salvation 3:210; “KNOWLEDGE OF CHRIST RESTORED IN BOOK OF MORMON. It was necessary in the restoration of all things that the people of this continent, who anciently had received the favor and blessing of the Almighty, should be brought to light through their history which contained the prophesying and commandments they received from God. Although it should be, as stated by one of their prophets, as a voice speaking from the dead, out of the dust of the ground, they were nevertheless to speak and bear witness for Christ.”
Jeremiah 24:7; “And I will give them an heart to know me, that I am the LORD: and they shall be my people, and I will be their God: for they shall return unto me with their whole heart.”
Listening to dead spirits from the earth isn’t how God relates to His people. He does things supernaturally in a holy, righteous manner, not through evil ones.