Posts are a broader category than they initially appear to be. The post is any content, even if you’re using WP as a CMS. While it might seem like a post is a blog post, really it’s anything you post on the site. Disabling it will kill all content. Better to turn off the various bloggy components, such as comments, and then edit the template files to remove references to the author, date posted, etc, to achieve a CMS site.
