Poems: Process and Challenge?

Is writing a poem so very different from writing a story or a novel?When I'm working on a story, I feel immersed in my characters' lives, their problems, hopes, and dreams. Outlines, scaffolding, drafting, and rounds of revision occur as the story slowly develops.When I write a poem, the whole process seems so different. I sink into a feeling, an image, perhaps a photograph -- or a poetry prompt