Western poetry, like their novels, has a tradition of realism. From Homer's Iliad to Divine Comedy, from Faust to Shakespeare, whether fiction or fact, western poetry is inseparable from long stories, but it is rarely purely lyrical and emotional. Just as our narrative novels are underdeveloped, so are their main emotional poems.
But the beauty gods of eastern and western literature will gradually patronize those barren areas. It is also a necessity for western poetry to break away from the realistic poetry pattern in the later period, and symbolism is a pure feat.