What is the significance of formal beauty of poetry to the spread of poetry?

I didn't care about the meter. Everything in The Book of Songs is just people's ballads. At that time, people sang what they wanted to say, and then they had rhyme, so it was easy to remember. After that, there are laws, paying attention to confrontation and leveling. Poetry is more fascinating because of rhyme, and emotional catharsis has a dual effect under the similarity of rhyme. And people's own memory is more sensitive to metrical rhythm. It can be said that if there were no metrical rhythm, many poems would have been lost.