Arguably, the most important organs (heart, lungs) are covered. If your guts and kidneys are hit, you've maybe got a better chance of lasting long enough to get medical treatment because they're not critical to keeping you alive in the very short term.What the fuck is going on with that vest Musk has on? Like I'm no expert but I was pretty sure a ballistic and shrapnel vest is supposed to cover your whole torso.
Although what you should be protecting most is probably your head, and none of those guys have helmets.