The answer to this question is—no. Even before the release of themes in WordPress 2.x, WordPress has been capable of managing static pages and subpages since version 1.5. Static pages are different from blog posts in that they aren't constrained by the chronology of posts. This means you can manage a wide variety of content with pages and their subpages.
WordPress also has a great community of developers supporting it with an ever-growing library of plugins. Using plugins, you can expand the capabilities of your server-installed WordPress site to include infinite possibilities such as event calendars, image galleries, sidebar widgets, and even shopping carts. For just about anything you can think of, you can probably find a WordPress plugin to help you out.
By considering how you want to manage content via WordPress, what kind of additional plugins you might employ, and how your theme displays all that content, you can easily create a site that is completely unique and original in concept as well as design.
Again, WordPress was built to be a blog system, and it has some great blog post and category tools. But if you want to use it to manage a brochure-style site, have a particular third-party plugin to be the main feature of your site, and downplay or even remove the blog, that's fine too! You'll just tweak your theme's template files to display your content the way you prefer (which is something you'll be very good at after reading this book).