You can have the adoration of those around you (which i certainly don't think is all that matters at all), be governed by a corrupt institution, and still have zero moral compass. All three are possible and, in fact, probably all feed off of each other.
The likely fact of the matter is, all D1 coaches (Bielema included) are probably looking at ways to bend and find loopholes of all these rules. And, as we've seen, the ones at the very top (blue bloods, etc.) tend to have more "resources" to do it with. Further, all their peers are also trying to catch each other and bring them down. The fact that Harbaugh was been caught more often than most (regardless of "how" he got caught) probably means he's doing something either more egregious, or just isn't playing the game as well to hide it.