The problem is you are connecting 2 dots that only connect because you want them to. If what you were saying were in fact true, then UK wins it all without question in 2015. But they didn't. They returned all the relevant players from a team that went to the title game, minus JR and JY. They replaced them with 3 lottery pick freshmen. Then went on to lose to the exact same team that the previous team full of freshmen beat. The exact same team.
It doesn't take experience, it takes 6-7 steady contributors, along with a little luck to win a title. It doesn't matter if those 6-7 contributors are freshmen or seniors. Ours happen to mostly be freshmen, but during this freshmen era with Cal, he has been on point with the historical averages of the best basketball program in the country. UNC won the game this past year because they had more contributors than we had. Our big 3 of Fox, Monk, and Bam was a wash with UNC's Meeks, Berry, Jackson. However, UNC got more contributions from the rest of their team than UK got from theirs.