> how does relinquishing control of the hardware help us

It's not relinquishing control, but separation of concerns for hardware.

Bank should manage their hardware, not your hardware.

Yep! Thanks for helping me put my points across better. It's like having a separate work computer, for example.

Okay, I guess more to the point, I don't want the banking app forcing the OS that I use. They can provide their own damn hardware!