Why do you trust the security of US emergency alerts? We know about security flaws in SMS, MMS and iMessage. I’m guessing not as many people outside the government know about the flaws in emergency alerts, but in this case I’d be most worried about them.
I trust iMessage a hell of a lot more than naked SMS.
Also emergency alerts in the US are now fairly well secured with a PKI (iirc). Doesn’t stop a dumb or rogue operator, but it does provide some authenticity regarding if the alert came from a legitimate authority or not.
I’m saying just the opposite. The threat model of an app that Apple has to install that goes through the security and review is the same as any other app on the App Store.
