I think this is absolutely correct. Ben, as he is, is a role player and his role is to score tons of points which I think he will. His defense takes him out of the role player category a bit but I am concentrating on his offense here. There is nothing wrong with being a shooter only as (minor hyperbole warning) but he could lead the league in scoring and never be mentioned in the same breathe as Kobe, etc. as he can't create his own shot. Let us just hope his handles improve. Handles may be that one skill that is the most difficult to develop but I get the impression that if this kid puts his mind to it, he'll improve substantially.
Admittedly I am in my honeymoon/swoon phase with Ben but I don't think I am wrong.
Just take a peek at the development of Klay Thompson. The big "knock" on him was he didn't have the handles or the ability to create his shot coming out of college, nor was he a good defender. He's soon changed all those notions about him and has become in my mind one of the best scorers in the game and one of the more complete 2-way players in the game.
Ben can follow that same career path, except with having the advantage of much more athleticism than Klay.