Legend of Korra series plot
“After the conclusion of the War, Aang and Zuko brought people from the four nations together and founded the United Republic, creating Republic City, a large "metropolis powered bởi steampunk-type technology" such as cars and motorcycles.”

I find it strange that Aang and Zuko decided to build a city, straight after the war.
Sozin started the war because he wanted the same thing right? (And to rule them all of course)
Why was Roku opposed to the idea anyway, Aang and Zuko thought it would be a good idea (‘they built their own city’)
Technically people in Republic city are living Sozin’s dream, right?
What are your thoughts?
( excuse the language/grammer , third English language speaker)