One test of a poem (for me, at least) is based on the qualities of good vocal ministry arising in the traditional quiet worship of Quakers: incantatory language and prophetic whirlwind. Unlike “slow prose” as a kind of sermon.
In vocal ministry, how often the message comes from within our current conflict or personal struggle!
Yes, we wrestle with God.
Poems and prayers you feel in your hands more than bounce around ‘tween your ears.