In my opinion, the most important qualification that a writer should have is the inability to do anything else. Incompetence in all subjects and activities improves writing in many important ways. It makes the writer wonder how things are done, and so encourages him to ask, giving him stuff (answers) to write down, whereas the competent won't ask anyone how to do what they do. How often have you heard someone say, "I can do it, but I don't know how to explain how." The writer can write that down.
Incompetence keeps me from finding gainful employment, which motivates me to write as an alternative to that.
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