randawg91,
Until you and your friend agree on a "pure shooter" definition, then you will be going around and around on the debate. If you define "pure shooter" as someone "creating his own shot" and then making them at a higher rate, then Korver will never win the debate. Historically we would not call that part of being a pure shooter. If you use the historic idea of "who would you want to take the shot (regardless of how the shooter got open)" then I would want Korver taking any shot other than in the paint.
Dribbling and crossing over and shooting is a skill for sure, but people should not act like running around like a maniac through 2-3 screens and then catching and shooting in less than a second and making it isn't. What Korver has done is historic!!!! I think Steve Kerr might have been the last person to put up the 50/50/90% in the NBA. If I am not mistaken, Kerr played much less and shot significantly fewer shots than Korver. Korver is doing this on a larger number of shots which makes it even more impressive and less "flukish" IMHO.
Hope that approach can help.
Go Hawks!!!!