The problem is that in today world people tend to be alarmist: There is rare case where data is perfectly safe or at least just an app can't make a SYSTEM secur

The problem is that in today world people tend to be alarmist: There is rare case where data is perfectly safe or at least just an app can't make a SYSTEM secure. Notice the upercase: it is the whole system that need to be secure. If the system is compromised, then there is nothing an app can do.