And there I was thinking I was an OK driver I can reverse caravans fine, but I have been in situations where that towbar would be bloody handy. Probably nowhere enough to jutify whatever price it is, but the video shows one simplistic use that a limited turning space would make it an advantage, but being able to reverse while having a better view down the sides in tight situations would be good.
I guess some people don't like admitting they are not perfect and denigrate anything that could be usefull just because thier knuckle dragging ancestors could move woolly mammoth carcases without mirrors and training wheels.