I obviously have no idea, but the small amount that I have seen and heard makes me have no doubt about that.
Of course you are trained intensley to do something, and that comes with some degree of risk itself, but I cannot imagine what it must take to put some of that into practice in the real world, with no more safety nets.
I'm not just talking about combat either, but oceans, jungles, extreme heat and cold, dangerous animals, poisonus plants and bugs, cliffs, tall buildings, caves, unhospitable terrain, and having to go anywhere to save and or kill someone at a moments notice...just the thought of that to the average joe like me is pretty incredible.
It's no wonder to me that so few are able to do so.