Angelina The chastity belt doesn’t have to be built like a tank. It just has to be tamper-evident and secure enough, and then rest of the design work can go into aesthetics, production cost and comfort. In any case, the video linked above shows the polyethlyene fabric is strong enough to stop pistol (and even some assault rifle) rounds.
Putting a locked wooden front door on a house certainly won’t stop all break-ins, but it’s simple and straightforward target-hardening. And besides, the wooden door is cheaper, comfier and prettier than a castle portcullis with a moat.
