For the most part, basketball skill exists in a vacuum. If you're good on one team, in one situation, chances are you'll be good in another. Rare are the times when someone so perfectly fits the schematics of one particular coach or roster.
But it does happen every now and again. Ever since zone defense was introduced, a panoply of strategic adjustments came with it. The same could be said for Mike D'Antoni's revolutionary pick-and-roll spread offense. With these strategic quirks come players best suited to implement them.
When this happens, the noted players are probably lesser talents outside of the system.