Are there benefits in having an unread blog?

Most people who blog about their profession (as opposed to, say, people who are keeping a journal for their own records or for their family and friends) like the idea of lots of people reading their blogs. But are there any advantages to having a blog that nobody reads?

The Alex cartoonist seems to think so, as can be seen in this wry look at blogging as a -- well, I won't give the punchline away. Read it, and smile.