It seems to me that Dupuis-Déri's very interesting article (https://www.anarchistfederation.net/francis-dupuis-deri-anarchy-in-political-philosophy/#/) overlooks something crucial. To truly deliberate, anarchists, whether optimistic or pessimistic, need to accept that there's no guarantee that the deliberation will succeed, for the values at stake may simply not be reconcilable. To assume that there's always a solution to every political conflict, and so that, at least in the ideal anarchist regime, coercion will never be required, is a form of utopian thinking that leads Dupuis-Déri and others to rely too quickly on force when opposing their utopia's enemies. I think this is why he has elsewhere written of "the wisdom of force" (as cited here: https://philpapers.org/rec/BLAPPA-2).