If things get really bad, and you get a serious injury, you are probably going to die. As he says, all that cool gear might keep you alive long enough to get back and say goodbye to your loved ones.
Things aren't going to be sunshine and puppy dogs if it goes sideways. Little stuff you hardly think of now can be very serious, serious stuff will likely be fatal. Many of us will likely die not in a gun battle with Feds or feral urbanites, but from something dumb that can't be fixed.
Be sure you know what we are headed for, that is a big part of mentally preparing for what is coming.