They will be able to do banking at least once the legislators tear down the walled gardens in a sensible way. Are the security benefits from the Appstore/Playstore real or security theatre?
I'm pretty sure that, if there are security benefits, they have been artificially tied to the use of the company's distribution method, that coincidentally really needs to be sending usage statistics, monitoring, etc. Surely there exist no conflicts of interest to be found.
fifteen years ago I use to do mobile pentests for banks and when we could not find anything significant for the reports we could’ve always count on “lack of rooting detection” and pin the risk on some vague mobile banking malware threat pushed by marketing. I am sorry I contributed to this nonsense.
100% security theater, and here we are.
Would you bet your company on that happening soon? :)