Brady and Rich weren't the reason Dantonio's Sparty teams finished in the top ten in the nation four times.
Don't move the goalposts. You cited his success against Michigan. There has been little since Harbaugh arrived and the games haven't been competitive with one exception.
You're right though. Dantonio's practices and the steadfast refusal to operate with any sort of decency as a human being or football coach is why that happened. Fortunately that stuff always catches up and in this case it exploded in his face.