HN, for all its faults, does a much better job fostering high quality discussion. And probably promoting interesting submissions as well, although I think the system is much more flawed in that regard.
Anyway, I think that a good chunk of "political" stories that have become popular on HN lately do belong here. Surveillance and freedom and how they pertain to the online world are big, fundamental issues of serious historical importance that we need to grapple with today. To remove those from our view because today it tends to be difficult to have a high quality discussion about a political topic is, I think, a mistake.
I think the issue is not one of whether or not HN should abandon talking about political subjects I think the issue is making sure that HN concerns itself with subjects that are legitimately important and conducts discussions that are mature, well-reasoned, and intellectually stimulating. And I think those things are well within the grasp of the HN community.