I agree to some extent, but where do you draw the line? What would be lethal conditions for some might be fine for an experienced party. Also, the bloke who got injured and his mate weren't originally with "Brave Dave", they just followed him down off the ridge.
I guess my summary is Dave is a twat but he was confident with the conditions and terrain and not a liability. Big mistake was dropping off the ridge AND taking two randoms with him. (suspect he dropped into "guiding" mode without thinking that he had no idea of these guys' skills & experience) None of this covers him glory.
However once the accident had happened he stayed calm, did the right things and contributed to saving the guy's life.