Comment by UniverseHacker

Unless you think/say/repeat the same things as everyone else on a subreddit you get downvoted and shadowbanned. It has the most aggressive and militant groupthink culture I've seen anywhere, which makes it pretty useless for trying to learn new things or share new ideas.

If you have any type of niche hobby for example, and someone finds a new and better way of doing something, they will pretty much universally be attacked and censored.