Do I engage in politics on HN occasionally? Yes. Is it my primary motivation? No. I don't open up HN with the intention of having rigorous political discussions, even though I sometimes fall into them.
My comment history, which it seems you only partially perused, demonstrates this to be true. Especially if you go back a year ago before things became politically charged around here.
I also don't see what relevance my example has to this conversation. It sounds like you're trying to corner me into a specific label (Republican, maybe?). I guess thanks for proving my point about discussions around here?