Traditional distributed databases require all nodes to be trusted to achieve consensus (e.g., with Paxos, Raft, etc.) Proof-of-work allows for consensus to occur even if there are malicious nodes -- for up to half the hashrate, which means that major collusion must occur to do something fraudulent.
In these industries the number of participants are in the hundreds -- past the point at which you can trust everyone.
In these industries the number of participants are in the hundreds -- past the point at which you can trust everyone.