I do not know why most poets write poetry but I know why I do so. I write because a thought gets in my head and bounces around till I write it down.
You could say that I don't try to write but that I am forced to write.
Now I do try to write "good" poetry that people will enjoy reading, but I don't try to write poems for people to read.
Most people find that they like some of my poems and hate others of them.