We're well into the 21st Century yet the ignorance and superstition of the Bronze Age is still prevalent today primarily in the form of religious belief. Why is belief in the supernatural still a thing? Why do so many people believe in things that aren't real?
Let's also throw in a few earthbound examples...
There are many millions of people who believe in some or even ALL of this stuff despite the fact that NONE of it is real. How do I know it's not real -- because there's no evidence to support any of it. None at all.
That's an important consideration. Mythology is one thing, reality is another.
Let me put it this way; if there was no evidence that dinosaurs ever existed, I wouldn't believe that they were real either but we have hundreds of years of research and a mountain of fossil evidence that proves they were real. Real things tend to leave behind evidence of their existence even if their existence was millions of years ago.
This isn't exclusive to the faithful although they are the most eager consumers of this kind of bullshit as well as the people most willing to forgo science, facts, and reason in favor of what feel good.
Why are so many people so willing to wallow in this ignorance? They not only believe it, they're PROUD that they believe it!