I mean, he's not the only one. A lot of people think RichRod - despite inventing this zone read offense he and so many others run, despite tailoring the offense you see today that runs play never run last year - is just the beneficiary of a really sweet QB - ignoring the maneating offensive line, the terrific downfield blocking by the receivers(and their pass-catching), and a myriad of other things.
Just let the train roll. There's no victory in defeating a weak opponent. Michigan already beat the only people at ND that matter.