Ignoring my comment on the healthcare post (which I only did because you submitted a bunch of them in a reasonably short space of time and the HN gimmick was too good to pass up), I replied to your comment to tell you why I down voted it. I wasn't the first person to post and clearly others down voted you too.
A lot of hackers care about healthcare and politics - even I do. My point was that there are a lot of other sources where these things are easy to find and they are, in my opinion, better suited to discussions on those topics for that reason. HN, from the vast majority of submissions and votes, is very tech startup oriented. A lot of people I talk to come here for that reason. From looking at comments and submissions, it seems most people do. Posting other things, like healthcare, though it may be interesting or useful to people, isn't very useful here because a) it makes the articles that most people come here for (from what I can see) harder to find (signal to noise etc) and b) its trivial to find these discussions elsewhere, so removing them from HN doesn't mean anyone loses out.
You are free to disagree; I just wanted to explain my views to you.