...hiring employees who personify that culture. This makes decision making and execution of processes efficient because shared values and norms are intrinsically part of all individuals. Throw in someone like Luke who is different, and the process is less efficient.

Whether this leads to more effectiveness, I don't know. It is always good to have differences of ideas, personalities, and backgrounds to avoid "group think." (yes, it also has its downsides)

I think for football and other sports, having the efficiency is more important because so many decisions during game time are split second. That is, you don't have time to debate. Yes, you can during a timeout, but that is the exception, not the rule.