Why are there so many examples of sightings worldwide of creatures that science says do not exist?????

Cryptozoology & Mythological creatures 

Cryptozoology ('the study of hidden animals'), attempts to prove the existence of entities from the folklore record, such as: 

* Chupacabra https://en.wikipedia.org/wiki/Chupacabra* Loch Ness Monster - ‘Nessy’ https://en.wikipedia.org/wiki/Loch_Ness_Monster* In Search of https://www.youtube.com/watch?v=qUECvtUE8Z8 * Lake Champlain Monster - Champ a periscope-necked aquatic said to inhabit Lake Champlain, USA; popularly known as Champ, the monster is as famous in the USA as the Loch Ness monster is in Scotland.* Mokele-mbembe  https://en.wikipedia.org/wiki/Mokele-mbembe    creature deep in the Congo * Mothman The Legend of Mothman https://en.wikipedia.org/wiki/Mothman* New Jersey Devil https://en.wikipedia.org/wiki/Jersey_Devil* Bigfoot - ‘Sasquatch’ https://en.wikipedia.org/wiki/Bigfoot* Bigfoot walk shot by Roger Patterson and Bob Gimlin in Northern California - 1967 - The Film That Made Bigfoot A Star  * Washington Laws Make It Illegal to Kill Bigfoot, If He Exists $10,000 fine and up to 5 years in jail * Provo Canyon encounters  Provo Canyon rock thrower  and another where it stands up   * Australopithecus* Forensic Expert Says Bigfoot Is Real* Gigantopithecus - a bigfoot orangutan cousin* Yeti - 'abominable snowman' said to inhabit the Himalayan mountain range An early record of reported footprints appeared in 1899 in Laurence Waddell's Among the Himalayas Yeti - truth to the tales?* Skunk Ape https://en.wikipedia.org/wiki/Skunk_ape  -

 'swamp cabbage man, swamp ape, stink ape, Florida Bigfoot' etc. 

            I think i saw a skunk ape 

* Kraken - ‘Giant Squid’ https://en.wikipedia.org/wiki/Kraken* Fairies?* Dinosaurs in the renaissance?