That's like saying Thomas W. Farley controls 21 trillion dollars worth of companies.

Pools do not control hash power, they merely organize it. That's not to say they don't play a major role in the politics of Bitcoin clients and rules, but to say they 'completely control' Bitcoin is wholly incorrect. These sorts of hyperbolic statements greatly degrade the quality of discourse on centralization.

Thomas W. Farley is so far from the same thing, I can only assume your being intentionally disingenuous. It's much closer to talking about the CEO of hedge fund, and they frankly do have massive amounts of control.

However, in this case the Chinese government can take over these data centers on a whim. You can argue it's a different story when it's spread across a million basements, but highly centralized hashing power is easy to either take over or take offline.