A serious question: Why is this not a poem?

I recently had the opportunity to judge poems and I think that really great poems have a lot of things going for them that aren't present in this poem. This poem does paint a picture. It was written like a poem. If it was a beginner's poem, I would hate to tell them it wasn't. If I was teaching about it I'd teach about what could be added. I've written many things that might be called bad writing just to get something I thought was my best work. Sometimes the best judge of a question like this belongs in the heart of who did the writing.