CNS, CDS, CJF, CUM etc.....the way these guys recruit....the difference it gives them over almost every other coach is a wider margin of error. the volume of talent they get to come to their campuses allows them a) to be aggressive in a controlled manner b) be more conservative, less risky c) with stand injury better than most
are these guys all good coaches? sure are.
but they aren't perfect. Saban didn't win big at MSU, nor did he do any great things at the Dolphins. Urban Meyer was very good at Utah, but he didn't dominate college football like he did at FL. Dabo lost, what, 4 in a row to South Carolina, and couldn't get over the hump against FSU.
what gets them all over the hump and showcases their ability to coach, is having all that talent. conversely, you take a Phil Fulmer or Mark Richt, both good coaches, both had great talent over the course of their tenures, but neither are considered to be on the lists with the Sahans or Meyers of the world. because they couldn't showcase their ability as a coach the way those guys have.
so to say it's one or the other or else...is wrong. talent alone doesn't do it, nor does being the greatest coach ever.