I definitely care if the Old Testament is literal history or not. That’s inherently interesting. Why doesn’t God reveal which is which? We might then be tempted to place a measuring stick on everything that distracts us from the message, and could get convoluted, as this part is literal, that one is figurative or exaggerated, this event happened but subtle differences or shifts for dramatic emphasis; this one actually was a dream, that one was a poetic story, and this was a record.
It also may present obstacles that are unnecessary: it may be revealed that something most believers are sure is figurative, allegorical, symbolic etc. actually is literal history. “No way,” they would say, and the church would infallibly declare something that would cause many people to leave the church, for an event that is not even essential to the faith.
The Bible is a library of human work and God inspired it, as is. The final revelation is Christ. Truth transcends fact. The exploration of salvation history is also an adventure that would be truncated by some revelation pointing out the facts as if they were more important than the transcendent truth.