The thing about the Rooney Rule is that it's really so cheap, I don't get the pressure against it. It's a few hours, a plane ticket, and maybe a hotel room in a multibillion dollar business. It helps the perception of a problem the league has had, and it doesn't hurt anybody.
I'd be interested in adding an exception if only one candidate is interviewed (for Carroll situations), since it gets silly at that point. But in any open search, why not?