A painter can watch the expressions on the faces of the people who look at his or her work. Musicians get energy back from each other and from the applause of their audience. But a writer works in a vacuum and then waits for a long time, sometimes forever, before finding out if the thing worked, made contact. You can go crazy this way, and the harder you work the crazier you'll get. That's why it's important for a writer to find an audience.
Writing is an art, and art implies communication.
Reason number two for being a writer. So get yourself an audience. Attend and participate in open readings. Swap stories on the Internet. Read to one another in covens.