Do you think that the cult of Mars or Mithra or Demeter or Pan or Bacchus or Caesar claimed that only their cult knew the truth?
You are divorcing the term "cult" from its historical definition and hijacking it to serve corporate culture industries.
"Ah, those endless forests, and their horror-haunted gloom! For what eternities have I wandered through them, a timid, hunted creature, starting at the least sound, frightened of my own shadow, keyed-up, ever alert and vigilant, ready on the instant to dash away in mad flight for my life. For I was the prey of all manner of fierce life that dwelt in the forest, and it was in ecstasies of fear that I fled before the hunting monsters."
Jack london, "Before Adam"