Although I take the article's claims around intentionally propping up the DDoS landscape with a heavy grain of salt, the fact remains that anti-DDoS services can be critical for sites on the modern-day internet, and that our reliance on them is a weakness which certainly has been exploited before and will be exploited again to silence disfavored speech.
Federation can be another mitigation against denial of service attacks. When our Lemmy server went down, I was still able to read our history of posts and comments via a federated server.