Or it may that this community is international, so you either have tech talks, or a pile of discussions about politics in every part of the world.
And by interesting - anything good hackers would find interesting.
It's a purposely high bar to filter out almost all mainstream news and even most tech news, and definitely most politics, which tends to satisfy emotional curiosity at the expense of intellect.
Unfortunately, it doesn't always work. These stories tend to brute-force their way in.