Why is if so difficult to pinpoint whe a specific Old Testament book was written?

Pinpointing the exact timing of when specific Old Testament books were written is challenging due to several factors. Many texts were transmitted orally before being committed to writing, leading to uncertainties about their origins. Additionally, the historical context, authorship, and linguistic changes over centuries complicate dating efforts. Furthermore, the lack of definitive archaeological evidence or explicit dating within the texts themselves makes it difficult to establish precise timelines.