By that logic, why ever hire an up-and-coming coordinator? Heck, Bruce Arians is out there. Super Bowl winner and .620-something winning %. Is he a better prospect than Ben Johnson, though?
There is a difference between a high-upside guy who hasn't had the chance yet vs. a three-time 61-year-old retread when it comes to how I look at coaches.
I feel like my posts on this have been pretty respectful. I'm not calling McCarthy a bad coach. I think he's a guy who can have success somewhere. I just don't think he's the right fit here. If he ends up here, he ends up here, though.