I get the idea that blockchain runs on the internet and you're connecting on it as the internet is controlled by a central power and they're the ISPs. And as for ISPs, they're controlled by the government. But with that comparison, I'll give you an idea and example of a decentralized place. Are dark web and deep web centralized? They're also running on the internet but there's no way to control them. The government can't even stop them.
I think that's because the government is operating a number of those dark web sites or at least keeping close tabs on them to follow money flows to build social graphs, mine data, and collect intel, etc.