Much of this is true, but I would not necessarily limit all subtle-level mystical experience to "data originally collected by sensory-perception." There is certainly that, but there is also the archetypes which according to Jungian psychology is from the collective unconscious. I seriously do not doubt there is far more the how reality works than our measly analytical minds can penetrate. There is information transmitted to us in ways we don't understand, behavioral information transmitted through genes for one thing without the benefit of role modeling.
For one to say they have experienced "God" or Buddha Mind, or Cosmic Consciousness, that is largely beyond the imagination, or any sort of subtle forms the mind produces through culture, or from the collective unconscious. Though that wholly transcendent is included in subtle form, it itself is experienced as formlessness. So there is no data. It is emptiness, in that all form is an illusion, a simple expressions of that which is beyond form.
So what you say is true in part, but only to a certain point.
Good point. I don't put much stock behind Jungian archetypes anymore, but there is evidence for genetic coding and cultural conditioning. These genes and memes do come from other people though, so I don't see any reason to infer an actual Cosmic Consciousness. If anything, the knowledge gained is that we don't know or can't know perfect knowledge. Uncertainty is the only certainty.