Joey jo jo: you raise some good points about other essential processes left out, that could of saved lives, and it’s vagness in other areas e.g circle vs a globe shape.
To perhaps find answers. Its best to understand the Bibles primary theme, the audience at the time, against the environment and resources that were available to the writer.
It must be acknowledged that the Bible is not primarily a book of History nor is it a science manual. Its primary theme is the fall and restoration of humanity through a mediator. That been said, its in the course of the narrative, that historical and scientific facts are mentioned as a by product to the restoration process.
It important for a bible reader to understand the principles of what is written rather than how it’s written. This has always been the case. If footnotes, citations, definitions, version 0.01 & 0.02 were to be included it would of become more a legalistic code than a moral one. The whole purpose of the kingdom good news would of been lost, to an arbitrary process of grammar, and citations. These resources weren’t available to the writer at the time. Nor was the audience ,aware of, or would of been concerned about weather the earth was a circle or spherical. It’s only in recent times with the rising popularity of evolution that the bibles historical and scientific record has come under increasing scrutiny.
Why didn’t it mention malaria, contaminated water, or kangaroos in Australia. Perhaps for the same reason that it didn’t mention the Ming dynasty in China. They weren’t relevant to the Jewish nation at the time. I guess its similar to telling people about the importance of quarantine during covid. When it falls on deaf ears. It isn’t relevant to them.
It must also be remembered that at the time of Isiah writing about a circular earth, there were more pressing needs. That would of been on the minds of the people. The invading Assyrian army. He conveyed the the idea that the earth was circular. God saved his nation from a security threat, and this is all that the audience needed to know.