I submit to you that he would have flourished anywhere. He wouldn't have been a champion anywhere, but in terms of selling himself to the NBA, dude he could have gone anywhere and be a lottery pick.
As a father of more than one child, I find myself constantly giving my children different advise...because all kids are not the same. What works for one, may not work for the other.
And because you got me going, allow me to say that if he had chosen to go to a college program that allowed him to shoot more, he may have been the #1 pick this year. Wouldn't that have been the smarter path to the NBA?