I think Kentucky is the epitome of what is wrong in college BB.
But Villanova won an NCAA championship -- with a coach ND could have hired when they hired Brey -- without renting players. And Butler went to consecutive Final Fours without, I think, renting players.
But your point is a good one. It will be tough to compete against teams with one-and-dones. I think ND can do better than it has.