The Desire for Excitement
Humans need stimulation. We have the greatest brain of any animal on earth, and we need excitement.
We want the world to be flashy and entertaining. We are easily bored.
Cops, for instance ... if you watch TV, you'll get the impression that your average policeman, on a regular basis, (1) goes undercover posing as a gangster or a stripper, (2) is engaged in protracted shootouts, (3) argues constantly with his irascible boss, and (4) sees automobiles getting blown up (they flip HIGH in the air, doing a somersault ... in slow motion, of course).
And when he arrives to rescue the helpless victim, it's just in time.
And TV shows lead us to believe that lawyers have at least one jury trial per week, every week, with surprise witnesses, dramatic revelations, and (of course) justice prevailing.
We WANT the world to be like that (a circus), and are disappointed when it isn't.
That's where the Satanic Panic folks come in.
In reality, the world is pretty much what's there. That is, what you see is all you get. Ogden Nash once said, "Things are often what they seem." And this just isn't good enough for some thrill-seekers.
So the "Omigod-There-Are-Witches-Among-Us!" folks step in, with their dark tales of the Hidden World of the Satanic Underground. Lurid tales of dark, disgusting, vile rituals. Mutilation. Murder. Secrets known only to the very few (makes you wonder how some overly-coifed white-bread suburbanite learned them).
It isn't sensational to reveal that something is a lie ... debunking a myth just isn't very exciting (for most people). How often do you see a newspaper headline that reads "ALLEGED SATANIC COVEN TURNS OUT TO BE NOTHING MORE THAN A FEW LOSER TEENAGERS TRYING TO GET ATTENTION"?