What do you mean by that. That yes, everybody can be Messi, if they "just worked harder". Obviously talent is the overriding factor. These daredevils had to be good at what they did too, as well as Messi being the best. Otherwise they'd fall at the first hurdle, quite literally.
Obviously, someone, who already has certain inborne traits and extreme personality/talent, will harness it further under right discipline and training, but the former needs to be there to begin with. Otherwise people like Messi or these extreme stunt men would be mundane phenomena.