Section 1: Spielberg
Maybe Spielberg doesn't know this about the UFO community, but it is well known (and celebrated) in UFO research circles that he collaborated with Dr. J Allen Hynek for Close Encounters of the Third Kind. He was close enough to Hynek that there is a Cameo of Hynek in Close Encounters (see below).
J. Allen Hynek got his Ph.D. in astrophysics from the University of Chicago and worked at Ohio State, later at the Smithsonian Observatory and finally at Northwestern. In 1948 he was hired by the USAF to study UFOs and felt the subject was ridiculous staying on through Project Sign, Project Grudge, and finally Project Blue Book. By the 60s Hynek had started to come to terms that some UFO witness were credible and there was really some type of phenomenon. In 1973 (4 years before Close Encounters would come out) he founded the "Center for UFO Studies." He also, it should be noted that he recognized the phenomenon as something "intelligent" but maybe more than just extraterrestrial: something he would share with his collaborator and UFO research legend Jacques Vallee, whom the French scientist in Close Encounters is modeled after.
Here is the link to the article below: https://www.history.com/articles/j-allen-hynek-ufos-project-blue-book but I think the Wikipedia article is more interesting. (no need to read all that unless you're interested).
What this is all getting to is I that think Steven knows more than the average person (maybe a lot more), or at the minimum has a very high ideal of what an average person knows about this subject.