It's not my argument really, I was trying to interpret what they meant with Bitcoin being the exception.
You're right that there may be better examples but how much of the world's email and DNS content is served by Google/Microsoft, I wonder. People are also complaining in other threads that Cloudflare is actually making the internet more centralized.
All of those are truly decentralized with a wide range of implementations and operators, not to mention proven real-world robustness as opposed to Bitcoin's hard requirement on a massive amount of always-on hardware and network capacity.