Even the blockchain world needs blind trust in its inputs - oracles or humans. Any society is by definition formalized trust and a blockchain society is no exception, just moves the trust in some other corners. And anyway when I hear about the blockchain goal to remove the need for "unreliable trust" I remember the hawala money transfers which are the very embodiment of a system based on human trust, the complete antithesis to the blockchain premises AND which works just fine in the real life.