The whole point of body armor is to make someone relatively safe from dying and restrict their movement as little as possible. So, yea you could make someone way safer by adding more protection elsewhere on the body, but then both the weight and the shape start to restrict movement to a point that isn’t acceptable for a lot of people. Basically it’s better to take a shot to the arm while running away than to be weighed down by your vest so you can’t run.
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