On the one hand I admire the “can do”, carefree attitude and it is a very funny take on the North-South divide. Excess stupidity propels most of us through our youth – it certainly propelled me and three mates up Striding Edge, in the snow, in February, armed with nothing more than a crap ice axe apiece.
On the other hand, the whole cool “look no pack” (often also no pads, gloves etc. etc.) thing with many mtb videos is a bit daft. Most of us know better, but not everyone does.
As other people here rightly point out, the hills are not to be trifled with. I’ve been on St Sunday Crag (opposite Helvellyn) on a glorious summers day and see a grey wall of squalling rain sweep in from the north, obliterating the view. The temperature dropped rapidly and, once the storm passed, the RAF rescue helicopter was out – a bloke on Helvellyn (up near Hole in the Wall) was walking in shorts and t-shirt with his kid and had no waterproof or weather gear and died of exposure. Only takes ten minutes.