I don't know what site you're thinking of that avoids politics...maybe lobste.rs? Here are some of today's top HN stories that I would certainly categorize as "discussion on politics".
There is a difference between discussing politics and political discussions. Things done by political bodies that have impact can be reasonably discussed.
Yes, DanG has written a lengthy, nuanced piece on the subject, because he has to deal with the reality that there is in fact no bright line between discussing politics and political discussion.
PaulG simply asserted that "no one can be proven wrong, every opinion is equally valid". Which is neither true, nor useful.
There is a difference between discussing politics and political discussions. Things done by political bodies that have impact can be reasonably discussed.