Every default subreddit on reddit is garbage and you should never browse them. r/atheism and r/politics were the worst because they were hateful and incredibly intolerant of anything that went against its status quo (if you practice a religion, you are the scum of the earth; if you lean to the right in politics, you are the scum of the earth). Another thing about r/politics is that it's an enormous sham, every top post on there is done by bots or people who are being paid by the site they're linking to cause controversy and pull in views -- you don't have to look hard to find that evidence. r/worldnews isn't that much different from r/politics
All the subreddits are too big to entice good content and originality -- if your post literally cannot be read in five seconds, it will never be looked at, in favor of more Bad Luck Brians or ISN'T THE LEGEND OF ZELDA GREAT? That's why r/music shuns anything that isn't Radiohead or Led Zeppelin, that's why all the top posts on r/gaming will always be some static image with a few words like "THIS GAME ARE GRAPHICS, DAE?"
So excuse me if I am not excited for more default subreddits, but they never mean anything good for current users.