So Kong, an honest question here. If Doc were your everyday John Doe with Austin as a son, I could see where dad may be a longtime fan of one of the big name schools and would likely want to see his son attend the school dad has been rooting for all of his life. That makes sense.
However, Doc Rivers is a former college and NBA player, and is now a NBA Title winning coach who knows all of the ins and outs of college hoops and surely knows the difference between the truly great college programs vs the average vs. the poor.
That said, Doc Rivers likely knows in great depth, that all 3 of the programs Austin is now looking at (Duke, Kansas, Unc) are all great programs who have each won a National Title in the last 3 years and who regularly send players to the NBA.
So the question is, why would a father like Doc, care one way or the other, which one of the 3 that Austin chooses?
I look at this the totally opposite way than some in that I feel Doc respects his son enough that he would not try to push him in one direction or the other with the 3 finalists. I think he would simply say: "I am pleased with your final 3, well done son, now choose the one that feels right to you and I am with you 100%".
Pushing Austin to either of the 3 would be selfish on Doc's part and he just does not strike me as that type of man.