I mean, the scenario being discussed here is some kind of "world ending" situation where all known encryption is broken. So you either do it the way I described

I mean, the scenario being discussed here is some kind of "world ending" situation where all known encryption is broken. So you either do it the way I described it, or you don't have any encryption whatsoever. I think under those conditions people would adjust. It isn't an alternative to our current arrangements. Also: my bank access is done entirely through an app that obscures its internal implementation. It could already be using OTP and it wouldn't make any difference to me, nor would I be able to tell(my point is that the user wouldn't need to keep a piece of paper that they would need to type in anywhere - the internal implementation of tools we use every day would change, but most users wouldn't even notice)