One reason why this is so striking

This program presents, almost side-by-side, the very extremes of the human spirit, from the kind of people who, despite the danger and the natural fear it produces, don't hesitate to do all they are able to do to help and protect people they don't even know, far beyond the minimum they'd have to do to collect a paycheck, and then, a day later, still reeling physically and emotionally from it all, can't wait to get back there in the heartfelt hope that they'll be able to rescue survivors...

...and all of that in stark juxtaposition to the base and disgusting depravity and hypocrisy of those who caused it all in the first place.