Many schizophrenics are attracted to religious ideas, and then elaborate on teachings from outside sources by adding information the imaginary voices are giving them. They often have supreme confidence in what they’re doing, because they’re sure they’re following orders from God. Steering seriously mentally ill people away from doctors and pharmaceuticals, and towards religious institutions as an alternative, is likely to get equally bad results. Did you bother to read the article in question?
By the way, Wilson Van Dusen's originial essay is available online [PDF FORMAT].