While I don't disagree with your assement that Kanter is a more finished product today, it ignores one of KOC's fundamental axioms--That when assesing young talent, you can't compare where they are at today, but try to project where they will be at in 2 to 3 years.
Further, despite how many times the Jazz repeat "BEST PLAYER AVAILABEL" they have a demonstrated history of locking in on a postional need. (Kanter is a pf, Jonas is a C)
It wouldn't suprise me at all if the Jazz draft Kanter but he won't keep that Jazz hat long. It also wouldn't suprise me if Jonas V. ends up wearing that Jazz hat by the end of the draft night.
Picking at 3 in this draft kind of defeats BPA. Who's to really say Kanter is better than Knight, or vice versa and so on. If two players are close in talent/ability then you pick the one that fits your team/need.