Right, but the value in "site:reddit.com" is the human nature of the content: we trust that a human wrote the Reddit comment in good faith, and we trust that it was upvoted by people who are knowledgeable in that area of expertise. I fear we are losing that important element with ChatGPT; or worse, it will create a feedback loop where Reddit comments are "enhanced" with ChatGPT snippets and fed back into the system, and we're back at square one trying to find a way to cut through the noise.
Adding site:reddit.com to searches improves the chances you'll get a result that is not totally wrong or spam because reddit has a built-in moderation system (upvotes/downvotes). The community also has little tolerance for SEO clone and other junk sites.
It's not perfect -- there are definitely gamed topics and bullshitters -- but it's light years better than default Google. I don't think I've ever seen a clone of StackOverflow appear on an upvoted reddit post or comment while I see those sites every day on Google.
I agree with you on the risks of that feedback loop. I'm hopeful that humans will still be around to moderate information on forums.