Why don't you use a pen name?

I have never considered using a pen name for several reasons. I believe a writer writing non-fiction should always use his or her name. It adds credibility to do this, while using a pen name has the opposite effect. Some potential readers would be inclined to think, if this is so true, why haven't you put your name to it? Of course, very few writers have a household-name recognition situation, but even without it, being willing to place your name beside the factual story you have written can only benefit your effort. In some cases, the writer may have a very good personal reputation before writing her first book, and that reputation can help draw eyes to the story. These are the reasons why I do not use a pen name. What are your thoughts?