To bluntly put it, I believe this was mostly just a self-fulfilling prophecy of certain users with stuffty personalities being given somewhat of a soapbox with political threads. That's why you don't see some people outside of this topic because they just really don't have anything else to talk about beyond politics.
Kinda why I support a politics & news subform so those certain users can stick to their own place, kinda like /pol/ was made. It gets tiring when people inject politics into unnecessary topics.