Snipers do take more skill than a shotgun, it becomes painfully obvious when watching a newer player try to use a sniper. And it only makes sense, snipers require smaller, precise adjustments to your right thumbstick and timing in order to be effective. Shotguns require far less precise controller adjustments and are most effective by players with good spacial awareness/map knowledge. The argument of shotgunners having more skill because they need to be in close proximity to get a kill doesn't hold up in destiny. Most maps are small and it's extremely easy to close the gap in destiny.