Why is poetry important (or not)?

I was thinking about this a bit, and then someone else asked me to share a poem of 'rage' with them. I have quite a few as eveyrone knows i'm an innately angry man. But in my search I found this poem, Unpoetry: , which is, by the way, extremely nasty and full of swears. Anyways, the point of it seems somewhat relevant to this particular thread.

I wonder if maybe it's a common thing for a poet, or perhaps any artist really, to think about. Is what i am doing relevant to anyone?