You're right, poetry should be the expression of the poet's true feelings, and what is forced out should be the best. Only when a poet has true feelings can he have the passion to write poems. But in the process of writing poetry, you need language restrictions, such as rhyming, antithesis and leveling, so that it is interesting to read. Even modern poems that don't restrict metrical rules require language refinement, and a sentence in daily life can't be a poem. In this way, we have to transform the poet's rich thoughts and feelings into language, but this transformation process needs to constantly scrutinize the language and find the most suitable words and expressions to express the poet's thoughts and feelings.
The so-called "creation" refers to this transformation process, right?