Is anyone working on fixing this? We can do so much better.
If they start selling their own devices, I will buy one and (assuming it turns out how I hope it will) recommend it strongly.
Many many people have banking apps that will not work on non-Google-blessed devices, use banks that have mobile websites that are terrible, and need to do mobile check deposits (which is usually only available in the app, and not the mobile website, if the bank even has one). And no, we're not going to "change our bank".
The reality is that there are so many things that break, sometimes in subtle ways, when you try to use an alternative Android OS. Some people may not have any problems, and that's great! But many -- I would dare to say most -- will.
And there's also a ton of uncertainty: I don't really want to wipe my phone, install GrapheneOS, spend hours messing with it and setting it up, only to find that something critical doesn't work, and now I have to flash back to the stock OS, and hope I can restore everything the way it was.