Again, you are incapable of engaging with what was actually written, choosing to run with whatever random nonsense comes to mind. Again, I what I specifically said(Which is borne out by dozens of examples, through multiple programs over the last half century), was that legendary coaches who are retiring in good standing tend to get the courtesy of selecting their successor. The issue is that in most cases, they pick a long time assistant or someone that is in the family. What we see time and time again is that person failing, and it's usually because they lack experience as THE GUY, also they have to live up to community expectations that can be overwhelming.
Duke went with Scheyer, because K wanted that, and honestly, Duke has gotten to the point where they believe that with their resources and support, they can backstop an inexperienced coach and win. Keep in mind, decades of evidence has shown that there is still an extremely high probability of Scheyer eventually failing. There are few and I mean few basketball programs where the legendary coach retires, and their successor even comes close to matching their accomplishments. Even in the examples I gave of someone pulling it off, it was football programs. You look at UCLA after Wooden(Bartow got ran out of town, despite winning a ton), UNC after Dean(Guthridge retired, he had the best run of anyone listed here, with two Final Four appearances in three years), Georgetown after JT(Esherick had 1 NCAAT appearance in five full seasons),Syracuse after Boeheim( Autry has been okay, he's hoping that Melo's kid is the goods) the list goes on. It's tough to hit on one legend, much less succeed him with another high end guy. Miami can't hope and pray that some unknown assistant or young HC with minimal sustained success is the guy, Miami needs to swing for the best possible outcome, period.