A distributive ledger supported by a multitude of corresponding banks can reduce counterparty risk, transaction times, and fees. A distributive ledger is shared by these banks so that they can use it as a replacement for rtgs (SWIFT, CHAPS) and for retail remittance. It uses the founding principles of the BTC blockchain but blocks are "premined" meaning algorithms come to a consensus instead of "paying" people to mine the blocks. This reduces the risk of having humans mine and is much more energy and time efficient. A distributive ledger applied correctly can ultimately help the bottom line for financial institutions. This is only one aspect of a distributive ledger. More similar tech is being built in insurance (smart contracts), exchanges, loans, repos, to name a few, ultimately in hopes to improve efficiency and security.
What do you know about the Internet? Do you understand how the Internet works? There are a lot of things out there that I don't understand but have revolutionized the world.