If it were that simple, then every FOSS project would be considered to operate under Anarchists principles. After all, the license and software forkability made it so that no one is forced to conform to whatever social structure is used to maintain a given project. But in real life, Anarchists will still argue that a Benevolent-Dictator-For-Life governance approach is wrong, even if it applies to digital artifacts that have zero marginal cost.

There may be plenty of good reasons for them to argue that, but none of them are "very simple notions" as your definition would imply.