Interesting that you're this paranoid, but yet you trust banks.
Sure, if you just trust some random Chrome extension from a random individual developer, you're absolutely setting yourself up for trouble when they hack your shit. But to wholesale dismiss all apps when there are actual legal protections in place that permit these businesses?
Also, what a glaring false dichotomy.
So to make "false dichotomy" stick, you going to need to assert that if Quicken were breached and this lead to my Schwab account being accessed by a bad actor, I actually am shit out of luck. Will you do that?