A GUI that wraps some system calls is how you end up using "p" for all your passwords. One of the many symptoms of OpenPGP not getting the investment it deserves and sorely needs is that there is no production-quality library implementation going.
A better implementation would be nice except that it requires a ton of specialist skill to get right. Plus lots of time. A wrapper is basically an interface. Getting interfaces correctly can be done by knowing what it expects, what properties should always hold, and what happens after each call. Correctness is basically one or more state machines with assertions built in for interactions between front end and library. Much easier.
