Well, the post is arguing that even if you're free to find another community that fulfills an intellectual need for you, intellectual communities in general are growing weaker or being driven underground because AI is poisoning the commons and removing a source of external motivation.

For example, I enjoy blogging, and want to use the time saved from my software job to blog more. But I'm less motivated to blog these days because there's so much AI-generated slop blog content, and less readers as a result.

Part of this is because there's so much output that readers can no longer afford to spend as much attention on each piece of content. Another part is that it's harder to find fellow bloggers who truly care about the craft. When output was hard, anyone who wrote a lot clearly cared a lot. Now we have to use other signals to find kindred souls on the internet. One way is through social connections and private discords. Another way is through new technology which we can use to reclaim the commons, for example via Pangram which can demarcate what content is human-written vs. AI-written.