> Curiously it became a poem that doesn't have to be taken literally after it was proven to be completely wrong.

Not really. The Mishnah, of the Talmud, originates from around 200CE. The first commentary on the poem treats it as a purely symbolic construction. These commentaries sum up thinking that was already common at the time, based on long oral traditions.

Not really, there's been scholarly argument against a literal Genesis since at least the 5th century A.D. if not before.