As you referenced in your footnote, this goal is a little like the goal of putting a man on the moon, if the year is 1900. One could the make the case that something resembling an AGI agent would be needed to design/manage a merchant website with any degree of introspection and customizability. Your machine would need to understand business objectives, UI patterns, aesthetics, etc before taking the helm, and these things take years to learn even for even humans. This is not to say that AGI isn't an admirable goal, but that it's an obvious one, just as I imagine reaching the moon was in the centuries leading up to 1969.
Scientific research is certainly a massively parallel effort, pushing the boundary of our knowledge in many different direction at once, but rest assured that there are many good men and women working in this specific direction.
(also know that I have a lot of respect for this kind of vision-oriented thinking, especially because it generally leaves the writer vulnerable to criticism like this)