Mythology and legends might be actual facts that had been exaggerated to a great degree so Jung might be into something. And considering that the human mind is easily influence by stimulus, incorporating religion with psychology could have a good or bad effect to a person defending on how it is use. Jung's method and interest might be unpopular in his time but his work influences the future generation.
One can long discuss the truthfulness of myths, mythologies and religions but that these things affect people cannot be explained away. And that people also bring forth new thoughts through them, people who have never seen each other before, who have the same ideas etc. is something amazing and still not explainable. There must be some kind of collective awareness, as Jung accepts. That would explain a lot...
But it is labelled as parapsychology and everything that does not fit into the dogmatic world view or is outside the box, is not taken seriously. But I also think, like you, that there will be changes in the exploration of consciousness.