Religion

it's not hard to describe the Big Bang in such a way that makes it clear and obvious you are talking about the Big Bang and yet would speak well enough to the people of the time.

The universe was nothing...and then BOOM, a big explosion happened and God brought all the stars in the sky and planets into existence. He placed stars all throughout the heavens, and around each star, he placed planets, and around a very special star, he placed Earth. Then over millions of years he worked to create life leading up to the creation of man, the pinnacle of his creation.
(Oh by the way what you are on is a big ball of stuff you call the Earth that circles a bigger ball of stuff you call the sun).

See, that's not hard. It's accurate enough. It's understandable to a child, and certainly would have been understandable 3000 years ago.

What we have instead is not accurate, and really, if it's divinely inspired it should at least get some of that right.

I'm agnostic because my definition of God is probably broader and encompasses more nuance than others might agree with, but most certainly none of the religions of Earth have any divine truth because if they did, they would get the basics of science right.