I don't think it's a conspiracy per se, but there has long been an effort to (as today's guests call it) "Weirdwash" many unusual features out of Bigfoot cryptozoology.  To mend that gap, they've co-written a book in two volumes: Where the Footprints End: High Strangeness and the Bigfoot Phenomenon Volume I: The Folklore    Volume 2: The Evidence  Joshua Cutchin is the author of several books covering weird topics including cryptozoological, Fortean phenomena, UFOs and fairies.  These include A Trojan Feast, The Brimstone Deceit, and Thieves in the Night.  Timothy Renner is an author, illustrator and musician living in Pennsylvania.  His work can be found in books, magazines, comics and album covers.  He's also a podcaster - creator of Strange Familiars, and has frequently appeared on the show Where did the Road Go.  His books include Beyond the Seventh Gate, Bigfoot in PA, Bigfoot: West Coast Wild Man,  and Don't Look Behind You.