I didn't
That's what happens when people perform religious rituals under the influence of psychedelic drugs. Those are still around btw, the plants aren't extinct or anything
We don't even evolve quickly, we only invent lots of stuff, that's what humans are good at after all. Besides that we haven't changed fundamentally, we still kill each other for bs reasons, are as greedy and selfish as ever and have cult like sociopolitical constructs.
Oh yes those guys exist. Who said there's no intelligent life in the ocean? Like I said, there are different kinds of intelligence and ability among different species.
That's a very limited idea of civilisation and a very human centered one. Btw ants are basically farmers, aphids are their livestock.
You seem to struggle grasping the fact that most people in the past didn't adhere to a rationalistic idea of the world. Whatever they saw during their spiritual journeys was as real to them as the material world. They also took dreams way more seriously. And again, there are still people around who share this approach to life. Idk why you're calling it a ''lala land'', as the depths of the human psyche didn't matter. They are
real but in a different way.
You mean actual caves? Like the cenotes in Mesoamerica, important places in Maya religion? Caves are kinda an underworld, no?
People seeing 'humanoids' most of the time means they saw humans with different features. Like Europeans who genuinely believed black Africans to be the missing link between humans and apes. People who don't get exposure to other phenotypes are quick to be surprised by their appearance.
It's very likely that stories about encounters with those were passed on over generations and because humans tend to attach religion and ritual to virtually everything, they'd turn them into magical creatures in their stories.
Then there's encounters with animals like bears standing on two feet that could be mistaken for a human from a distance.
There really are logical explanations for many of those mysteries that are in no way less interesting.
About the supposed indigenous heritage of the Sasquatch I'd recommend you this video
There are actual sources clearly stating that the "creatures" in question are humans who for some reason live in the forest away from large settlements, the popular Sasquatch stories also mix up different phenomena.
Those kinda debunking documentaries have been around for ages btw.
Are there government conspiracies? Of course. But EVERYTHING mysterious and unknown is not a government conspiracy.