Of course, there are many belief systems on earth, as well as the standard scientific POV. Several people stay within the standard scientific paradigm, while many others follow a particular religion or belief structure. Such belief structures may exist on a multitude of levels where extra knowledge is only revealed to a small percentage. This all conveniently can cause one to primarily focus on their POV about reality & the universe. It also makes it easy for secret societies to flourish.
An expanded POV or open mind can allow for a tremendous amount of data cross referencing. Every non human being or entity isn't necessarily of the devil, a demon or the Djinn. However, its quite a tough thing to determine this at times. Thus, its much easier for the system to perpetuate the believe that there is only one planet that has intelligent life on it. Consciousness & intent has a very broad spectrum on this world in & other places & dimensions.
Heidi-Hollis like many, has done a lot of research into the negative or shadow side of energy & intent. The same goes for the research of Mike-Heiser & LA-Marzulli. All these people don't have to agree with each other or even have the same goals. A broad spectrum of independent research can result in a vast POV, but its not a necessity. Most people seem to choose a form of data compartmentalization so that its easier to fit into a particular mind set.
Travis-Walton experienced an encounter or abduction, depending upon ones POV.
William-Bramley wrote a very thought provoking book called, the-Gods-of-Eden.
Paola-Harris has done quite a lot of UFO-ET research & so has LMH. Peter-Davenport has taken a tremendous amount of UFO reports over the years. These researchers aren't intentionally looking for beings or entities that stem from the negative end of the spectrum. Rather, they are collecting data of various entities & crafts from what people have seen. Some of these entities may have their own agenda & some could even be what Hugh Ross warns about. However, some of them could be of a benevolent nature, but its not always easy to determine the true intent of people, let alone other beings & shapes behind the cosmic-veil.