No. From the very line you quoted:

> ... the cached data coming from the web is the _content_ of the page, where the checked out repo I'm in is dealing with the _layout_ of the page.

> What better than the real content for that?

Nothing, which is why that's what they do. They figure that the content of the page as it exists when you first load the development server is sufficient, and so cache that content. It seems unnecessary to me to have my development server update the content if a new post goes to production in the middle of my work.