The idea of lowering the learning curve for website development has fascinated me for the past 10-ish years during my employment in the content management system industry. Every once in a while the idea that a tool can replace a developer surfaces, energizes a few people, and then falls flat for one reason or another. Yet it always resurfaces, likely due to the revolutionary nature of a successful solution.
The most common reason for failure I've seen seems to stem from the idea that a website requires a developer due to a website requiring massive amounts of meticulously written text in an esoteric language; by replacing this text with a graphical interface, a website no longer requires a developer who understands how to write this text. Experience leads me to believe a developer serves a much different purpose in building websites.
Consider applying this logic to another problem, such as writing. If one builds a tool allowing non-writers to drag correctly spelled words and punctuation onto a page, then a non-writer now has the ability to write gripping novels, impactful research papers, and influential editorials -- and they can do this without knowing how to spell. This doesn't make sense, of course, since writing a book requires a certain understanding of how to communicate effectively, an achievement demanding a much more clever tool.
Much like writing a book, writing software also demands a much more clever tool than a graphical, drag-and-drop interface. Developers understand more than how to write text in odd languages; they understand how to solve problems. Creating a graphical interface for building websites doesn't remove the necessity of a developer. On the contrary, it creates more jobs for more developers who specialize in building applications using a drag-and-drop interface.