The problem with reddit is that you get downvoted simply for going against the hivemind, even if you supply evidence that you are right. It's impossible to have a meaningful conversation on the more popular subreddits, especially on politics.
That totally depends on the subreddit. r/politics? You're absolutely right. But the more focused subs offer a wealth of information about obscure topics. For example, check out this recent thread on r/machinelearning where people have an in-depth discussion about hype versus reality: https://www.reddit.com/r/MachineLearning/comments/donbz7/d_i...
Politics, internet, meaningful conversation - choose two