I think your post is the backwards one here. Intelligence, familiarity with great coaches, and work ethic are parts of what make up a good coach. But you're missing something huge: people skills. The smartest, hardest-working guy in the book will be a terrible coach if he can't effectively impart what he's teaching his players. Is this guy personable? Can he interact effectively with college-aged kids? Does he run drills/deliver lessons using language and tone that allow players to connect with his message and get the most out of it? Will he be able to command respect because of what he says and does as a coach, not just his status as a successful player? How is he as a motivator - does he bring intensity without being too harsh for his message to be lost?
Granted, Emeka might be the most personable teacher on the planet. But none of us (besides Chief) can confirm whether not he has what it takes to coach collegiate basketball players for sure. (aside: if someone here had him as a camp counselor at one point, I'll bite my tongue.)
You may think this is dumb new-age bunk, and that none of it mattered back in your day, but this is the reality of the basketball world today.