Your second paragraph just proves you don’t understand the nature of power. Why did Russia Cuba and NK need nukes? Because people without nukes are weak to their enemies. So until the anarchist territory is global, it needs to participate in global geopolitics, in which nukes are actually one of your primary bargaining chips.

Otherwise you’re just a piece of land with no government, and most historical invasions take place when land becomes an easy conquest. Because land is materially useful.