There are politics and there are Politics, and I don't think the two of you are using the same definition. 'Making decisions in groups' does not require 'oversimplifying issues for the sake of tribal cohesion or loyalty'. It is a distressingly common occurrence that complex problems are oversimplified because political effectiveness requires appealing to a broader audience.

We'd all be better off if more people withheld judgement while actually engaging with the nuances of a political topic instead of pushing for their team. The capacity to do that may be a privilege but it's a privilege worth earning and celebrating.