So, Rysn's Dawnshard was totally used with Surgebinding to make the Dawncities right? E.g. the giant windbreaks in Kholinar that everyone wonders "How did they make those?" that would seem outside the power-level of Radiant soulcasting.
Let's just say this is a linguistic connection I expected people to make.
Also, creation of the Dawncities (and Urithiru) is beyond the scope of what a Radiant, or even a group of them working together, could create via Soulcasting. (Though note, it's not beyond the scope of what Surgebinding itself could do.)