Agreed. So why the debate over science, when there is an entirely different truth that the Bible is trying to tell us?
I don't understand this question.
Well, I have to disagree with you here. History shows ancient people believed in a firmament - a big glass inverted bowl that held the rain back.
That's the Kabbala interpretation, and irregardless of what the people believed, they wrote what they were supposed to write.
If God would have autographed (written in His own handwriting) the entire Bible Himself, we wouldn't be able to tell the difference.
The sky is blue, there must be water up there... that sort of thing.
It sounds to me like you're assuming their lack of modern-day knowledge affected the veracity of what was written; and nothing could be further from the Truth. God superintended the writing of His Word, and I'm sure He would not have preserved It, had It been written with errors.
I don't think God cared about their science.
Then why is Numbers 5 a lie detector, and Leviticus 25 espousing non-chemical pest control?
You do realize that the Hebrews used state-of-the art technology, do you not?
Why do you think the [true] Bible says "brass", instead of "bronze"?
The Israelites could look like harmless farmers one instance, and in a moment's notice, convert their plowshares into fighting instruments.
Who employed sonic technology in wartime to bring down the walls of a superfortress built to keep invading armies out?
I could go on, but I think (okay, hope) you get the point.
Is the plan of salvation not so simple that a caveman can do it?
Yes - the plan of salvation is summed up in 19 one-syllable words in 1 John 5:12.
Is Genesis 1 and 2 about science, or is there some other truth there?
Genesis 1 and 2 are about history.