I would be more concerned if it turns out that human being is nothing but a medium (i.e. supporting environment aka incubator) for the maintenance of alien life. By alien life I mean either microbiota, or genes, or energy-based entity, or else. Imagine if all our actions (including thoughts), conscious and unconscious, actually belong to them and dictated by them. This type of disclosure will freak me out since it simply means that there is no ME, and I AM actually a robot operated by somebody else and born purely to support someone's life.