There's value, even for the flowery stuff. Its just one of those facets of the thing where the cultural and artistic can shine through. There is elegance and strength behind well worded pieces. Read pretty much anything written by John Adams, Abigail Adams, or Jefferson. Then compare it to the best efforts of politicos today. And they were mostly writing each other informal letters!
The language doesn't need to be a minimalist technical document. It can be something artfully crafted and appreciated for that value, as opposed to a line of HTML.