A poem is learned by heart and then not again repeated. We will suppose that after a half year it has been forgotten: no effort of recollection is able to call it back again into consciousness. ↗
Whether you listen to a piece of music, or a poem, or look at a picture or a jug, or a piece of sculpture, what matters about it is not what it has in common with others of its kind, but what is singularly its own. ↗
But short films are not inferior, just different. I think the short gives a freedom to film-makers. What's appealing is that you don't have as much responsibility for storytelling and plot. They can be more like a portrait, or a poem. ↗