Humans are greedy, untrustable bastards. All of them. No matter if it is a single person, or a group of humans binded "with a multisig cryptographic contracts". No matter how good looks their past "track record".

They will break all their own past promises and rip you off badly, once it becomes profitable for them. Unless they can't. Unless they have to REWIND the whole blockchain.

There is no single human on this planet, which I trust more than an open source blockchain algorithm.
(Big one, I mean. Bitcoin.
Not some random shitcoin.)

Humans are weak. Humans are flawed and vulnerable. All of them. Hence - the wars, crime, and all the other evil on this planet.

Blockchains (global) are the solution.