There is nothing else for Dimon to say.

He cant favor decentralization since it is going to clean his clock. Blockchain eliminates the need for third party verification systems. This means that banks are seriously reduced in size since most of what they do is exactly that. Once blockchain performs that task, what need is there for most banking?

Even being the market maker in many markets isnt going to be required since decentralized exchanges can be programmed to handle that.