alt Hacker NewsWell, yes, the point of the solid bone plate right in front of your heart is to block stabbings. And it works!
If you had a weapon that wasn't bothered by the presence of the sternum, and you wanted to stab the heart, you'd go right through the sternum.
the risk is one of being unable to extract the weapon expediently.
there is an unacceptable risk of having to abandon it.