A guess. I mean, I just do not follow those legendary half-breed humanoids perspectives. No offense to people with different mindset, just saying. Maybe we tend to complicate things even more than they already are. Getting rid of some of the theories may be a productive thing. Until all options are rejected. For example focusing on one of the two major points of view: 1.The realistic, coldblooded understanding, that everything has a natural explanation (murderers, KGB/CIA (although I do not reject this theory, if the KGB/CIA did such a poor job, that’s suspicious for itself.), military (same), infrasound and etc., and 2. The suspicion, that something beyond our reason is involved (UFO, Yeti), etc. .