That's not my experience. There seems to be subreddits on every conceivable topic, and you can subscribe to whatever variety you want and you'll get a wildly varied range of views/politics/whatever.

There are even 'change my view' type subreddits for people looking to understand and debate the 'other side' of their arguments.

The comment you are replying to becomes more valid the larger the subreddit regardless of its subject. You wouldn't think subreddits like javascript and programming would be hotbeds of rampant emotional insecurity fueled by deep echo chambers, but they certainly are.

I wasn't too clear in my phrasing. Although Reddit as a whole has relatively diverse views, each subreddit has a very specific hivemind.

and one fact they want to ignore, many of the politically oriented subs are managed by PACs who worked for years to get their people into moderator positions if not create subs as they needed them. then through mailing lists, text alerts, and such, they know what stories to post and act on.

reddit is anything but wild wild west anymore, its been co-opted by those who know how to manipulate opinion of products and persons

I don't think this is all that specific to Reddit, though. I mean, even /pol/ was 'infiltrated' by the likes of CTR (although this of course doesn't work, since 4chan is aggressively anti-everything).

Furthermore, the fact that all moderated political (and even many nonpolitical) forums are pushed and pulled towards the extreme fringes is understandable, even to be expected: those who take moderator jobs are those who are most driven about the subject at hand, and those are most often the ones with a fringe opinion.