Its top 100 or so subreddits are moderated by the same ~10 or so individuals who impose their ideological views on the subs and delete posts or ban anyone who dares challenge them.
A great example of how community moderation inevitably slides a platform to one side or the other of the political spectrum.
I honestly don't think mods on reddit should be allowed to moderate more than 1 or 2 of these top sub-reddits, this would at least force some semblance of diversity of thought on the platform.