Being a specialist doesn't mean being rigid and unable to write
about any other topic or in any other style other than the niche you've carved for yourself.
As a professional writer, you have to specialize in something but be versatile enough to do a broad range of stories. There is, of course, a limit to how diverse a person can be as a writer. But as a general rule, it's a good idea to expose yourself to a handful of genres.
– Russell Eshleman Jr, The Philadelphia Inquirer