They're talking about banning it from state owned devices. Your app doesn't just know what you ate for lunch, it knows everywhere you go and it collects information about the networks it's connected to. Depending on the permissions (social media apps ask for basically everything possible) they can store your camera roll, text messages, emails, even some passwords if you're not careful. For most people the worst they could fear from that would be identity theft, maybe blackmail. If that's on a state owned ipad they could get all kinds of sensitive information. Most of the people who get recruited to do espionage are not James bond types, they're janitors and receptionists. All a bad actor needs is a way to get into the network and they can wreak all kinds of havoc or spy undetected for months. It seems like this issue is being used for culture war but there is a real problem.