Mainly it’s always bothered me that Squarespace etc can charge so much for simple static sites. I just don’t think most people realize you can host websites for free if you don’t need a database.
There is still a real gap between "making some HTML" and actually getting something published on the web, especially for non-technical users. A simple path on top of GitHub Pages makes a lot of sense.
Curious how you are thinking about the next step after publish. Do you want weejur to stay intentionally minimal, or do you see it growing toward simple editing / updating workflows too?