I'm a competitive shooter and I've been, at times in some top national rankings. In my youth my fast twitch was insanely faster than average Joe. As I got older that slowed and the field improved.
I've been around some of the best shooters in the world and unique genetic abilities in thing like "See speed" which is eye alignment to both gun sights, target and ability to catch other items like shell ejection angles is unreal.
I've had the fortune in life to be engaged in competition or training with premier athletes not just in shooting but in swimming, football, boxing, track and even racing. Beyond the pure physical aspects there are the unique genetics for which there is no replacement nor substitute. When you combine those aspects with drive, ambition, work ethic and "killer instincts" you get KD, Phelps, Nolan Ryan, Valenino Ross, and Brady.
The rest of the world gets to sit back, watch and dream.