Actually, it's not possible for commercial banks to profit from being cut out of the money game. A CBDC would by it's very nature stop them from issuing fiat, which they do with every loan they make.

They do seem to have more power than the fed does though, so I've long said that there is no way in hell the Fed will be issuing a CBDC in any way. That's for countries like China where the banks aren't a larger cartel than the government is.