Seems like an arbitrary distinction. Job, school, marriage, et al are all social constructs with certain principles and rules to try keep things operating smoothly and beneficially to all participants. You can break the rules in any of them to the detriment of your counter-parties.
In this case, they cheapen the brand of a Harvard degree and potentially screw the non-cheaters if there's a grading curve.
I think there is a distinction, since cheating completely defeats the purpose of school (learning) or games (fun), while breaking some rules may create more value than it destroys in the case of entrepreneurs (like Airbnb and Uber do).