Zaheer’s point that makes no sense
In the spirit world Zaheer tells Korra that Wan made a ”mistake” by closing the spirit portals… but why? Based on what?
In Beginnings it’s shown to be objectively a good decision by Wan, as it drastically reduced human-spirit conflict, made the world safer for humans, and the spirits themselves aren’t evenshown to be unhappy about it either.
Zaheer just says “we have to go back” as if that state before the avatar was the original state. The spirit portals, if I recall correctly, were created by Vaatu. That suggests that the state of the world we are shown in Wan’s lifetime is not even the original state, as the portals didn’t exist at some point before.
Zaheer provides no other reasoning for calling Wan’s decision a mistake other than “humans and spirits should coexist”. Again, why? Vaatu mentioning that he created the spirit portals suggests that spirits and humans likely didn’t coexist sometime in the distant past either. Also, the fact that every avatar after Wan, even the ones immediately after who probably knew or the portals, decided it was a better idea to keep them closed. He never provided a real argument for why humans and spirits, being with completely different morals, levels of consciousness, understanding, goals, etc. should coexist.
Nothing about the state of the world in Wan’s era suggests that it was “balanced“ in any way, shape, or form. If anything, it was especially unbalanced with how spirits dominated much of the world and humans were limited to small pockets to survive.