Since the concept of genuine piety and devotion is foreign to this professor, all piety must be superficial piety. Sheesh.
That's why it's important for the professors to just teach the concept and the basics, and leave the 'piety' up to the Holy Ghost and it's recipient. If one is going to teach religion, one must realise that piety is real, or at least a desireable option open to some.
Those that can, do. Those that can't, teach.