Why Write?

Writing can be fun. Writing can be relieving. Writing can be a pain.
It seems today that most of the things I write are filling in blanks on paper work and homework assignments. Lately in a psychology magazine I read an article that stated writing down the negative thoughts you were having and then throwing the paper away could be therapeutic. I had a councilor tell me the same thing once when I was having anger issues with someone I'd never have the pleasure of yelling at. But why write? Why sting letters and punctuation together to form thoughts into sentences that can be shown and decoded by others by reading? Writing is a great way to communicate and connect. If you can read and I can read then both of us can write letters to each other and have some kind of conversation. Books can allow us to escape inside a world that cost no money to get to, just maybe some eye strain and a good light source.
Writing is what it is, and I think why not write?