I kinda get their point, but i feel like it’s using a relatively specific meaning of the word “rule” : to me, not all rules imply external enforcement. For example, rules of a game rely solely on players good will. Or “principles” of an anarchist community are still rules, even if they just rely on people respecting them to exist. But that may also come of my limited understanding of english : is the necessity of coercion really necessarily included in the meaning of “rule” ?