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dPOS is centralised to a permissioned set of block producers, right. When they speak about "decentralisation" they mean that they have lowered the economic hurdles for you to take part in this political process of becoming a blockproducer. So technically it does not decentralize anything. But dPOS is obviously not relying on topological decentralization, it relies on delegating power to representatives of which 21 will produce the blocks.

Since voting in Steem is plutocratic (dependent on your money) it is not democratic and heavily biased towards creating circles of power and influence. The "government" does not wnat to discuss this aspect...obviously they are not interested in "power to the users".