Indeed. It's not even just banking apps - even my TSP's app refuses to run on my Samsung phone now that I have tripped its Knox counter. It's just a lazy and convenient approach to prevent tampering.
Very much OT, but maybe it’s worth a shot... I wasn’t able to do a full backup of my Galaxy (encrypted, stock, unrooted) so installed TWRP. Now I’m stuck in the infamous boot loop and can’t get out. Knox is tripped.
I kind of really need to get in to get some files in there. Should have known better but it’s a bit frustrating that it was precisely trying to perform a backup that made this happen. Can’t find stock firmware anywhere and even if I did I’m not sure if it’s possible to flash it without wiping ...
I don’t suppose anything rings a bell?