This doesn't make any sense to me. Wordpress is simply a content management system, which allows for dynamic content through PHP. But when you look at the source code, it's still HTML, CSS, and Javascript behind it. And it's still HTML and CSS that robots are reading. So, in terms of SEO, it doesn't really matters whether it's a static site written exclusively in HTML/CSS, a WP site, or a site developed with Ruby. What matters is how clean and optimized the HTML/CSS is.
I believe WP comes with most of the basics for SEO out of the box (easy control over URL and permalinks structure, easily extensible with plugins, requires little configuration), but of course, it's not going to be doing everything that someone who actually has some expertise in web development and SEO could do. But then again, you wouldn't expect any software or application to replace expertise, would you?