us = the left or the right; the system; etc.

You're basically advocating that someone should be on one pole or the other. I think your premise seems dishonest:

First you gave an assumption about an 'unjust' system and explain why not choosing a side is bad, but then later on you say that not choosing a side isn't 'inherently wrong' to try to not seem judgemental. It comes across a little manipulative tbh.