Owl to Ryuuji Agni Kai is strictly a Fire Nation ritual. If the other states have similar practices I do not know.
They can by the King, who is coincidentally my father. To answer your question, I suppose I am not important enough to worry about. No, I know I'm not. He knows I wouldn't do anything to him, and he probably expects me to work hard to get back into his good graces. Father knows what he's doing--and for a long time, I did want to return home. It was home, I was born and grew up there, I wanted to be there.
Perhaps there are more dragons in Asia. But I think you are right. I should be able to see them all.