In my place you can create a bank account via online in just 5-10 minutes without going into physical bank location just using android/ios app and you can deposit instantly after creating of coures KYC must be submitted so whats the difference with this on Selfkey? Personally I dont know about it and how it applies blockchain and its usecase like bank.
In their case, they created a marketplace for these banks to make it more convenient since they can all just be accessed through a single app. I guess their KYC process is much faster too since they're using their own decentralized identifier. In that way, you won't be needing to fill up your KYC info over and over again for any future applications.