Reddit is filled with very vocal terminally online people. Their views and actions are not representative of normal human beings.
Reddit went mainstream many years ago, hence the marketing dollars spent there on astroturfing, and brands acquiring pet moderators. The posters/commenters/readers follow power-laws like any online/offline community.
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.