Yes, but somehow, web browsers never check for "device integrity", and websites just blindly trust that the browser, or whatever it is on the other end, would do whatever it's told. They don't even have a reliable way of telling what kind of device or OS the user is accessing the website from. And everyone seems to be fine with that.

And that's how it should be with apps, too. And people need to be educated to never, ever be so trustful. You lost your savings to a scammer? Well, you'll be more diligent next time.