A historical perspective that should not be construed as religious discussion-
Before the introduction of Christianity to Europe, the aboriginal peoples were tribal, honored their ancestors and local nature spirits and gods. They interacted with the landscape and were dependent upon its resources. When Rome began to assimilate these tribes into their nation state, the cultural beliefs of the indigenous peoples had to be discarded so that they would submit to Roman ideologies and ultimately, Roman rule. Ballance did not exist, only the need to extract resources to benefit the Roman machine.
Then, the religion of Christianity was introduced. The path of Christianity was not in the land, but in a building where the deity was said to communicate to the people via the priest. Laws were given to scare people into accepting beliefs and an abstract projection of guilt was utilized in something called a sin. Old traditions were discouraged, and any tribal story was relegated to demonic worship. The detachment to the old ways was effective. So, trolls, orgres, grendel, and bigfoot type creatures were relegated into evil, the wild places were transformed as the lairs of horrible creatures and spirits, and people forgot who they were. Only remants of the indigenous beliefs remain in folk tales, sagas, a few pieces art and archaeological finds. Likewise, land use practices changed, the old growth forests and wild places succumbed to tthe needs of a growing population and industrial progress.
Lets move about 2000 years forward to the mass European colonization of the New World. The sins of the father were visited upon the son. The landscape of the Americas was ripped to shreds to glean natural resources, the indigenous people enslaved, and their own traditions and languages ripped from them and as recently as the 20th century, forced assimilation programs were instituted by the US government. What horrible actions happened in Europe 2000 years ago happened in the Americas only 500. There are still wild places left, and conservation has helped preserve our natural resources. If something like sasquatch exists, it has a shot to persist. Any such creature in Europe does not share a similar fate- too long and too brutal industrial persecution. Likewise, many American aboriginals have their languages, stories and traditions somewhat if not mostly intact. They have the folk memory and landscape to remember and possibly interact with bigfoot. I wish them luck, as the trappings of my own ancestors are fragmented and forgotten.