Correct, though I don't think the comment you replied to intended to imply that such pressures & rewards didn't exist elsewhere or that this particular outcome was either general or not.
It just stated that the specific pressures and rewards present in most reddit communities tend to encourage this specific style of writing.
Maybe you are right and it was just a plain statement. But it sounded quite snarky to me. As if it was condescending reddit for biases given subreddit might have, like HN has none.
This is literally the basis of human interactions, thats how we humans work at every scale to form friendships/families/societies/nations.