foreign aggressors that will intervene after the revolution

They're not going to wait that long, they'll intervene during the revolution. So any anarchist revolution that succeeds has already proven to be militarily capable of resisting foreign aggression. Military organization/defence is obviously not antithetical to anarchism.

large scale distribution / planning is needed to industrialize

Syndicalism specifically and anarchism generally isn't against confederation and large scale organization, otherwise all anarchists would be egoists. We just reject the state as the means to do it.