There's actually some really good content in incredibly popular threads but it's nearly always overwhelmed by nonsense replies to the first comment.
I guess some people that, but I challenge anyone to close every top level reply in a very popular article and see exactly how many are at the top. Basically the same everytime. It's like a virus.
Am a regular in r/space and most things aren't that popular but some things randomly blow up. There was one thread with well over 1000 comments and right down the bottom, Only 4 hours after the original post was a JPL employee, who was working on object in the story, it was highly detailed, incredibly informative, well-written, and with all the nitty-gritty downsides and shortcomings of engineering work. I'm guessing very few saw what that person wrote compared to 400 puns at the top. It's shameful.