My point is that Juve have always had an eye towards the future, which is exactly what Jovetic would have been. And correct me if I'm wrong, but they spent a total of 9M on the striker position. I would be more than inclined to agree with you if you put a 3 in front of that 9 for Tevez and Llorente, but they didn't.
Those 4 players were purchased with an eye towards the future. There isn't any young player that Juve have right now or with the exception of Tevez, that are anywhere near as good as Jovetic on their current roster. But how many seasons can we expect form Tevez, realistically?