I never really understood that:
If I'm using my browser to do banking via the website, Having root privileges and tampering with the Browser running the applications is not an issue.
If i use the banking app, Having root privileges suddenly become a problem.
--> To me, it doesn't look like the problem is technical, but that users are accepting things on mobile that they wouldn't accept on a PC.
In true New Hampshire fashion, the whales too became ungovernable.