Not all sites need to be 100%, everything-going-on about WordPress sites. Sites that want to do this would definitely need a team of writers to keep up. Personally, I'd rather subscribe to sites that focus on specific things about WordPress and publish stuff once or twice a week. Find something you're good at and build content based on that. For example, a site that publishes development tutorials. There'll never be a lack of things to write about, and you wouldn't have to publish something daily to push out quality content.