I think you shoot your shot and try to get the best HC that you can. Assuming they don't think Rizzi is that guy, you make those guys say no to you. If they all do then you give the job to Rizzi.
Rizzi could end up being a very good HC if he can find the right coordinators. But, it's a highly risky move that could just as easily, or more easily, bust since he doesn't have a super power running either side of the ball and there is no indication he has amazing talent evaluation skills. He's probably a good motivator, but that's not going to be enough if he can't find/keep great coordinators and/or can't identify the right talent to upgrade our talent. We hear a lot of Dan Campbell comparisons with Rizzi. But, he doesn't have the credibility Campbell has of playing in the NFL and even Campbell struggled for a long time before all those draft picks built his talent and he found to really good to great coordinators. It will be interesting to see how well Campbell does when those coordinators take other jobs.