When there are coaches like Shanahan, Holmgren, Gruden, and Cowher up for positions, no, they shouldn't bring in a random minority to interview to satisfy a rule.
Browns fans tell me, you want an experienced franchise builder, or risk years of mediocrity or worse wondering if minority canidate with less experience than Mangini is going to pan out? You want Al Davis to interview some guy at another Bed and Breakfeast, like his attitude, and hire him as head coach for 1/10th what he'd have to give someone like Cowher (assuming anyone we've heard of will take a job with the Raiders)?
Sure, the Tomlin story is sexy, and he's got a good team and attitude (and is cheap thanks for his inexperience), but with sure bets available, the Rooney rule is stupid... and this past offseason it was extended to positions like VPs and Football Czars so for what Lerner is hiring for it applies. The question is if it applies for an interim and then has to be applied again for a permanent hire.