The current situation is that banks regularly require the use of an unmodified, unrooted Android or iOS device, which reinforces the duopoly and makes it impossible for anyone to compete. (Even emulating Android doesn't help, as emulated Android won't pass the checks banks do to make sure you don't have control of your device.)

That situation is not acceptable. Got something better than insults like "pretty dumb" to say about how to resolve this abuse of the two-player oligopoly in the mobile phone market?