Crypto banks are indeed a necessary evil, we can't simply just jump people into a solution that isnt user friendly and scalable. Until we can come up with a front end feature that is as intuitve as putting a person infront of Google and asking them to find something its going to be a painful adoption for most.
Cryptobanks may be a solution for helping keep peoples money in crypto, improve transaction volumes and network security and be overall good for the network yes its not a purist practice but we need to make compromises for now.
One day no one is going to have a care about the underlying tech its just going to be how we trade but that future will only be there if we keep making strides. Dont see it as old systems jumping on crypto, see it as crypto infiltrating old systems