why use a seat belt and air bags?...added protection...
its not about avoiding getting hurt...if you get shot, you are going to get hurt...you are going to end up at the hospital with probably serious injuries...
Several reasons, three of which are: 1 Some protection near and past the edge of the shock plate. 2 To contain fragments of the bullets and spalling from the shock plate. Nothing ruins your day like shrapnel in your neck. 3 Shock plates are brittle, often made of ceramic, the outer holder and ballistic cloth pads help to contain a cracked or shattered plate that might still offer some protection from other projectiles. Unlike at the testing range, an enemy force does not stop shooting while you replace a cracked plate.