You're advocating for the users to make their choice at the worst possible time. There's no reason to give a new app special trust when you sign up with it.

But if you come to trust the app, and Apple excommunicates it, should you need to rely on Apple to help you reestablish your own contact with it? That won't work -- Apple already demonstrated that they don't like that app.

That's why makomk's complaint is

> there is no way for users to prove their accounts belong to them without Apple's co-operation

rather than "I should be able to get customer emails from Apple regardless of what the customers want".