Why on earth is that
Because it is not something you train for in most carriers. It is basically a takeoff in which the aircraft is trimmed for a very low speed, with flaps not in a TO setting and the TO Config blaring at you. This wasn't a base training TnG, it was an "ohh sh1t, we are running out of room to stop" TnG. I've never heard of a carrier actually training this maneuver.
And it is one thing to set about doing touch and gos, or actually grazing the ground during a low altitude go-around - but this is completely different. These guys rolled down the runway several thousand feet, getting closer and closer to hitting the tail.
Can it be done? Sure, but it is a maneuver that increases the risk quite sharply of something going wrong, and should therefore not be "normal". I guess if you think you are gonna go off the end it might be a better option, but it certainly is a much more dangerous maneuver than a plain old GA.