From the article:
What “A Scenario Analysis” fails to do is to actively engage with the more than abundant evidence that humanity is currently being visited by extraterrestrial life. In the abstract, the authors categorically state: “humanity has not yet observed any extraterrestrial intelligence.” Yet there is an incredible amount of physical evidence concerning sightings of UFOs under intelligent control displaying flight characteristics far above what is known to be possible in conventional or even classified aerospace research. In addition, there are also numerous whistleblower reports concerning crashes of UFOs, and retrievals of extraterrestrial biological entities. Finally, there are also first hand witness reports of contacts, both voluntary and involuntary, with extraterrestrial entities. Rather than acknowledge the existence of such evidence, the scientific study chooses to dismiss it all together adopting the well known SETI perspective that no extraterrestrial contact has yet been made.