Who determines valid religious belief, awash in sanctimonis respect in the US, vs. psychotic delusions? I associated with a woman suffering from schizophrenia once. Her voices told her to dunk herself in water immediately, maybe related to her seminary training. She was dragged against her will and committed. What is the different between Jesus' voices and prophetic voices, such as John in Revelation, and schizophrenia. All cultures were aware of mental illness. One exults you and the other strips you of their civil rights. Not even criminals are carted off the way the perceived mentally ill are.
For decades, the Soviet gulag was the residence for political dissidents. Western observers could not find a single element of mental illness in them, even after long deprivation and punishment. The Soviets believed they were mentally ill for dissenting. Merely dissenting meant you were will. No other explanation made sense.
I am curious how Freddie Franz garnered legitimacy. He had to be more than available. Somehow he defined doctrine. The seminary experience had to help but I don't see how it was determinative. Did he offer bribes? What type of person believes they are receiving revelations unknown since the infancy of the church? If you read Barth, Luther, Bonhoffer, Merton, C S Lewis, Hans Kung - they have faith in themselves but do not believe they are the only way God's holy spirit functions. Luther did not believe it in the beginning but evidently power went to his senses. Freddie Franz had to use a bathroom and as Dylan famously said, he had to stand naked.