Ignoring the obvious bait in the title, I think it’s mostly a numbers thing. On Reddit you can follow only communities that you vibe with, and the voting system works to keep low quality posts down. I’d be surprised if there wasn’t the same proportion of people on Reddit that you find objectionable, but they’re stuck in the bowels of downvote hell.
Or maybe you’re just surrounded by people with different views or life experiences and don’t know how to process it. Idk.
I mean, I can kinda see it being useful for people wanting to sell a wee box that does nothing but launch a game on steam.