The reality is the Bears have interviewed a wide variety of lesser known candidates whether they are white or minority so don't think George is strictly Rooney rule. He is likely in the category of guys like Campbell, Stenavich, Smith, Weaver, Kafka, Petzing where the Bears want to hear different ideas and possibly get a head start on building out the staff.
And those guys accept because it gives them valuable experience regarding how the interview process works as well as feedback on what development they need to improve themselves. Most guys rarely get hired the first time they interview.