I do not how transparency will help them, because they like to do things behind closed doors in private permissioned ledgers. The thing that might
interest them, is the cost savings for their administration tasks and that would mean more profits going to the shareholders. The Blockchain is being
exploited for the very thing it was developed to replace. How ironic
Cost savings and faster settlement times - That definitely are the 2 reasons why banks are looking at the blockchain. But why do you think blockchain is being exploited for the very thing it was developed to replace?
I think what the person is trying to say is the old Libertarian thoughts are that Satoshi's view on centralized services like banks were to replace them with Bitcoin. I do not necessarily agree with that train of thought, but I think it might be a better solution for many of the problems associated with these services.
Will Bitcoin replace the banks? No, I doubt it. They will just adapt to the new technology and keep doing business.^sad^