I initially responded to a dumbass post complaining about Rich Rodriguez's recruiting when he was here. That view is completely erroneous. Then people slightly changed the subject.
It isn't a competition between Rodriguez, Carr, and/or Hoke. Carr added a bunch of guys to the 2008 class before he stepped down. Hoke did a great job locking down Bryant and adding Clark to the 2011 class. In between Rodriguez added a bunch of really good players, though he certainly wasn't without flaw in recruiting (should have offered Bullough and probably could have handled the Hankins situation better, needed more OL in 2010).
It is about understanding how you end up with a good football team. The answer isn't "coach better". It is also about people refusing to acknowledge that you don't end up 11-2 because the head coach was shitting his pants for 3 years. If Coach Hoke goes 7-5 or worse in four years, it won't be because he is getting worse at coaching. If he wins a national title, it won't be because he got way better at it. It will be about the guys we bring in. If he leaves Michigan for whatever reason and another guy has a ton of success, it will almost certainly be because Brady Hoke brought in a great class in 2012/13.
That is just the way the world works. There is no motive or agenda, just reality. Unfortunately people who do have an agenda (mad at RR because we lost) or who don't understand reality because they don't have the proper knowledge base (SEE Gary Moeller's career) or have been bamboozled into the hero-worship culture we attach to football coaches still refuse to accept it. When those people are making decisions or formulating policy while operating under poor premises (need to land the in-state recruits, spread = GAY, Martavious Odoms is a shady guy who can never play in the Big Ten, etc.) you can end up with negative consequences.