> The UN isn’t a supranational organization fixing conflicts.

The UN's explicit purpose is to try and prevent conflict. One of the requirements to join is to renounce the right to use force in international relations except in self-defense.

They do that in a number of ways. One of those is to have these types of symbolic votes. The hope is that by having where everyone stands out in the open, whether on silly things or serious things, it will reduce conflict. Does it work? Sometimes yes, sometimes no.

Obviously world peace hasn't been achieved. It probably never will be. Nonetheless, that is the goal of the UN. They want to try to fix conflicts.