https://www.poetryfoundation.org/articles/89288/why-write-in-form
Extract:
Unlike other arts—and perhaps even other forms of writing—readers and writers alike often associate poetry with feeling, not technique. Part of this may stem from a misunderstanding of William Wordsworth’s famous definition of poetry, in which he begins, “Poetry is the spontaneous overflow of powerful feelings. …” His wording encourages a reading in which poetry simply occurs and does so uncontrollably. If this is the part of the quotation that sticks with you, it’s no surprise that you might associate poetry more with emotional intensity and less with the how of its conveyance. But in the second half of that quotation, Wordsworth tempers his original statement: “… it takes its origin from emotion recollected in tranquility.” Those unexpected and powerful feelings are actually being observed at a calming distance from that emotion.
More important, Wordsworth’s statement doesn’t acknowledge the structure that serves as a scaffolding for those feelings, a framework that makes a poem more than just cathartic release. It doesn’t acknowledge form. Why would it? For Wordsworth and his contemporaries 200 years ago, form was assumed. If a poem didn’t rhyme, readers could be sure it employed some sort of metrical scheme.
How my heart sings 