Do people serve the blockchain or does blockchain serve the people? This is the question to ask.
Bitcoin is more autonomous than Bitshares and as a result it has less efficiency or adaptability. Both serve different purposes though with Bitshares being a decentralized exchange while Bitcoin is a cryptocurrency. The human in the loop is a safety precaution because without it if things go too far you'll be the remote controlled human slave to the blockchain mining for life for a block reward which is could be a chemical release from your brain chip right to the dopamine centers of the brain.

Who wants to be the blockchain controlled human? If people don't want that then it's obvious that the blockchain exists to serve people.