You are conflating talent and current skill level. You are also leaving a lot of things out of "talent".
In fact shooting, up to a certain point of medicority, is rarely even cosidered a talent at all -- the theory goes that almost anyone can make themselves a decent shooter just by practice (as opposed to somebody with remarkabel feel for it -- i.e. talent -- such as Peja). Not necessarily true of course, but certainly far more true than somebody at this comparatively late stage of their career working themselves into Reke's driving ability. The closer something comes to an innate ability, that's talent. And yes under any traditonal formulation Reke is a feakish talent. Few players can match his package of natural abilities and instincts. And Parker and Manu aren't any of them. Could Parker or Manu end up having better careers than Reke? Sure, but only if Reke squanders his talent. Ony if he doesn't put in the work. With work its no contest at all. 10 years into their careers, playing for the same franchise and same coach and same system with the same core teammates year after year after year, and already there is a question with a kid in his second year surrounded by other kids and a handful of middling vets.
the honest question you have to ask yourself is if LeBron James of 2003 entered the league this year and had the same rookie season he had 7 years ago, would you claim that Manu and Parker were more talented than he was? If you would, your definiton of "talent" needs severe overhaul. Those guys are good. But if you pooled all their talent together into one body they still wouldn't be as talented as LeBron. As gifted. As instinctual and powerful.