I can't think of anything to write about, but I'm writing anyways. This must be what's wrong with the internet. Lots of people with nothing to say who are persisting in saying it anyways. Nothing, that is.
Why is this? Vanity would be my best guess. Everybody wants to be somebody, and especially to be a writer. It sounds glamorous.
"What do you do?"
"Oh, I'm a writer."
Sounds a lot better than a great many other things you could put down as your occupation.