That was me that said that, and – yes – there are no bathrooms in the Spirit World. That was an oversight. However, it does backwardsly explain how Unalaq is so chummy with the Spirits despite the portals being closed until very recently.
Interesting bit of world building that Iroh was able to choose to let his body die while he remained in the Spirit World…
…oh no. Jinora.
-Da7e-