Let us look at the genre of books which we call the Prophetic Books which makes up about 1/3 of the Bible divided into The 5 Major Prophets-Isaiah to Daniel & The 12 Minor Prophets. The Old Testament prophets had great responsibility of hearing Yahweh’s words, boldly delivering messages or warnings to Kings & men of influence. They faced persecutions, demanding extreme obedience and exemplary faith.

The common use of poetry is used to appreciate the heart of God, not just His commands. Christianity has become like that. We don't know how to love God as we don't know how much God loves us. These books help us see the emotional side of God, He gets sad when His children reject Him and brings judgement. He controls every detail of the future. He is holy and righteous. What a wonderful God He is.