To me the point is this: Everything can be mismanaged. Whether something is administrated by private individuals, public companies, governments, communities, ... does not prevent things from being mishandled or squandered. After all it can only take one mistake to destroy one asset or resource entirely.

And it's that deliberate omission and the insistency that one approach will always fail, while another will always thrive that makes "The tragedy..." a piece of propaganda, rather than a serious argument.