Those are a lot of abstract things to have gods for, things Zuko normally considers to be the inventions of people. There isn't much in that list to do with the elements or the natural world except for that Kynareth. But she doesn't give this too much thought, because most of them don't seem important to Paarthurnax's story, and anyway she never gave the spirits that much thought either.

"Wait. All dragons, including you?" Somehow it doesn't sound like he's talking about ancestors.