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Why does miners choosing their own blocks not solve the centralization problem? If a government wants to ban addresses, they now have to force every individual mining farm to not include specific transactions in their templates instead of just forcing a few pools. I don't know what the ratio of mining farm/pool is though.
This is unfortunately beyond my understanding of the intricacies of the protocol. My guess is that pool centralization is still required because you still need a pool. How much control does that pool have? Certainly less than before. But more than an infrastructure that doesn't need pools at all (for example, a truly P2P "pool").
As long as you need a pool for something, there is some centralization and risk of the pool being attacked for some nefarious purpose. But hopefully someone here can chime in with a source or explanation which is more well-explained.
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