No, I'm not assuming that, I'm taking the arguments above about avoiding statist control of transactions at face value.

1. A centralised blockchain is a database with bad performance.

2. But that's my point - blockchain doesn't sidestep government and regulation as you and many proponents assume. In the short term maybe, while government catches up. In the long term, all your transactions are in public and can be inspected retrospectively, so good luck avoiding taxes or regulations with it if people actually started using it as a currency. It cannot reduce government because it does not replace government, it's aiming at the wrong target and just hand waving away problems of power which are central to control of money.