Well........maybe living forever is a curse. As someone who is saved and knows where I'll go after I die (with assurance), I'd have to say it definatley IS a curse.
Those three Nephite dudes must have done something very, very bad...Jehova (Jesus, who is not the same as Elohim, God) must have caused a cloud upon their minds so they couldn't remember where the blasted Hill Cumorah was, and obviously they lost the priesthood because they fell into evil.
BUT WAIT....the Church never published an "official" statement that the three Nephites actually exist....OR that the Apostle John is still wandering the earth, never to die. : )
Is Mormonism polytheistic?