I'm not convinced that taking more than one shot in a row makes a decisive moment not decisive, or that doing something someone else sort of did reduces a shot to mere imitation. No doubt HCB was less pure than some would like to think, and perhaps less than he'd like us to think, but I do notice, for example, that of the three pictures shown of people jumping, only one shows a person at the very precise moment he is about to drop into a puddle of unspecified depth. Some might also consider that there's a difference between what one suspects are models jumping on command and a person caught jumping by necessity. Whether that makes the image good or not, you can argue, but it does suggest that the image is different.